Good day, and thank you for standing by, and welcome to Cue Health Inc. fourth quarter 2021 earnings call. At this time, all participants are on a listen-only mode. After the speaker's presentation, there'll be a question and answer session. To ask a question during the session, you'll need to press star one on your telephone. Please be advised this call is being recorded. If you require any further assistance, please press star zero. I would now like to hand the conference over to your host today, Caroline Corner, Investor Relations. You may begin.
Thank you, operator. Welcome to Cue Health's fourth quarter 2021 earnings call. Joining me on today's call to discuss our results are Ayub Khattak, Chairman and Chief Executive Officer, and John Gallagher, Chief Financial Officer. Our prepared remarks will be followed by a Q&A session. During this call, we'll be making forward-looking statements, including statements related to the expected performance of our business, future financial results and guidance, strategy, long-term growth, and overall future prospects, as well as the impact of the COVID-19 pandemic. We wish to caution you that such statements are subject to known and unknown risks and uncertainties that may cause actual results to differ materially from those we projected or implied during this call.
In particular, those described in our risk factors, including in our final prospectus related to our initial public offering dated September 23, 2021, and in our Form 10-K for the fiscal year 2021 that will be filed following this call. You should not rely on our forward-looking statements as predictions of future events. All forward-looking statements that we make on this call are based on assumptions and beliefs as of the date hereof, and Cue disclaims any obligation to update any forward-looking statement except as required by law. Our discussion today will include non-GAAP financial measures. These non-GAAP measures should be considered in addition to and not as a substitute for or an isolation from our GAAP results.
Information regarding our non-GAAP financial results, including a reconciliation of our historical GAAP to non-GAAP results, can be found in our earnings release, which was furnished with our 8-K, Form 8-K, today with the SEC and may also be found on our investor relations website at investors.cuehealth.com. Finally, a recording of this call will be available on our investor relations website shortly after this call has ended. With that, I would like to turn the call over to Ayub for his comments on fourth quarter business highlights. Ayub.
Thank you, Caroline, and thank you everyone for joining us today. We've made tremendous progress towards our goal of creating a new way to access the healthcare system, combining accurate diagnostics, virtual care, and soon antiviral delivery, all on a single platform uniting healthcare providers, enterprises, and consumers. I'm happy to report we've achieved significant growth in our installed base, shipping to date nearly 250,000 Cue readers. This large increase of our installed base across all of our customer categories, thanks to sophisticated customers in the traditional healthcare space, such as Johns Hopkins and University of Pittsburgh Medical Center, to enterprises such as Google, Netflix, and Salesforce, to government agencies and individual households, is reflective of our core platform capabilities, speed, accuracy, and integration with the digital ecosystem.
With these core platform capabilities in mind, the growth in our installed base is particularly important as Cue Reader is durable and capable of running all future tests in our menu expansion pipeline. Excitingly, we launched our direct-to-consumer offering in Q4 with integrated virtual care, e-commerce capabilities, including same-day delivery and video-based supervised testing, all natively integrated into our accessibility friendly mobile apps. Today, we have over 220 directly contracted organizations as customers made up of healthcare provider organizations, governmental bodies and enterprises, up 2.5x since the end of Q3. Our $618 million in 2021 revenue during our first year as a public company, up from $23 million in 2020, demonstrated our ability to execute a coordinated strategy across our manufacturing, product, and commercial teams to bring our vision of the future of healthcare to life.
Our mission of delivering more integrated and accessible healthcare is a global one, and we're glad to update that we've begun commercialization internationally in Canada through distributors, enterprises, and a direct-to-consumer offering as well as in Singapore. In addition to signing many new agreements, we also extended our existing agreements and expanded our relationships with many of our key customers, including Google, the NBA, MLB, and many other major sporting leagues. We also announced a partnership with Albertsons, wherein today, Albertsons customers at over 900 locations and communities across the U.S. can get a Cue test administered by their local Albertsons pharmacist. This is an important public health initiative, driving increased access to the lab quality molecular testing we provide in communities across the U.S., especially for those communities that might not otherwise have access to lab quality molecular diagnostic tests.
Through the quarter, we purposefully and radically expanded our distribution in the healthcare provider space. I'm pleased to share that we are now distributed by Cardinal Health, McKesson, Medline, and Henry Schein, and we will continue to expand our reach to smaller healthcare provider clinics and other fragmented markets. To the Department of Defense, we shipped 6 million Cue COVID-19 test cartridges and 30,000 Cue readers over the contract life, demonstrating our ability to scale manufacturing and deliver on large contracts. Through this agreement, our product reached underserved communities in 18 states, thousands of schools, nursing homes, correctional facilities, and community health clinics across the country and the military. Today, we continue our DoD conversations regarding broader opportunities to utilize their installed base.
For example, we were recently awarded an IDIQ electronic catalog contract from the Defense Logistics Agency with a value of up to $50 million, which facilitates the acquisition of Cue products for any federal agency. Additionally, we're seeing that our strategy of placing install base is working for the public sector customer category. Leveraging our public-private relationships and successful deployment, we've converted several end user public sector organizations and states into direct customers, such as the states of Minnesota, Colorado, and Wyoming, among others. To help us tell Cue's unique story of creating and introducing a new product category beyond the traditional healthcare system and into the home, we have been investing in awareness. We added Chief Marketing Officer Nitin Duggal to our team. He joins us from Abbott, where he led the marketing launch of their continuous glucose monitoring system.
We're excited to leverage Nitin's skills and experience with marketing to payers, consumers, and healthcare providers. Eileen Sheil joins us as Co-Chief Communications Officer. Previously, she led corporate communications at Cleveland Clinic and Medtronic. We're excited to have Nitin and Eileen join to help bring awareness to the brand, connect to our customers, and tell the story of Cue. They join what has rapidly become a world-class leadership team here at Cue. The best-known sports leagues, such as MLB, NBA, NHL, and many NCAA teams, utilize Cue, and in this new category of molecular testing anywhere, anytime, we're finding innovative ways of marketing and bringing to life our vision of the future. It is such a unique time, where diagnostics has entered the cultural consciousness and behavior and expectations of how the healthcare system should work have evolved dramatically because of COVID.
We've partnered with some of the biggest athletes and stars to help bring our product and brand story to life in the minds of our customers, from NBA All-Star Karl-Anthony Towns to Super Bowl champ Aaron Donald and actress Gal Gadot, all avid Cue users. Now, you may have caught our Super Bowl ad, which was seen by 107 million viewers and drove a 10,000x increase in our traffic to our website after it aired. Our number one goal with our Super Bowl ad was to increase awareness of our brand and establish Cue as a digitally connected smart health lab platform that will serve consumers beyond COVID. As we have created this new category of molecular testing spanning the home and the traditional healthcare system, we've had to rapidly scale our manufacturing.
Last year, we increased our production capacity to nearly 100,000 test cartridges per day, measured over a seven-day period, as part of completing our DoD agreement. This represented nearly a 50x scale-up of a novel molecular testing product in the course of one year, fully integrated, highly automated, and domestic. This is the result of a decade of investment in product design, automated manufacturing, and excellent execution by our operations team. The strength and ownership of our manufacturing capabilities provide us with a core competitive advantage going forward for quality, cost, and supply capability. All of these investments we have made in scaling our manufacturing, from biochemistry production to cartridge manufacturing, will serve our test menu expansion with no modification required. This shortens the path from R&D to at-scale commercialization for our future test menu.
Let's talk a little more about one of our key growth drivers: menu expansion. Menu expansion is critical to our future because each test will significantly expand our addressable market, but more importantly, allow Cue to become ubiquitous as the natural choice to turn to at the first sign of respiratory symptoms or for sexual health concerns. As consumer behavior has evolved to expect immediate answers for health issues, just as we experience with other parts of our life, from food delivery to transportation, we believe this paradigm has shifted in consumers' minds for testing for infectious diseases, similar to how glucose meters and pre-pregnancy tests have changed the paradigms for their markets. Our pipeline in development includes tests in the respiratory, sexual health, women's and men's health, cardiometabolic, and wellness categories, all of which will run on the Cue Reader.
The Cue Reader is the basis of our install base, in which we have shipped nearly 250,000 units of. Our R&D team is making exciting progress, executing well against our near-term milestones for menu expansion. Starting with our goal of COVID 510(k) clearance, we completed clinical enrollment in February ahead of schedule and expect to submit our COVID product to the FDA for De Novo review in Q2 for 510(k) clearance. For our flu A&B test, we began enrolling patients at our clinical study sites in December as planned. We expect to continue enrolling patients in the study through Q2, with the expectation to submit for FDA De Novo review in Q3. Flu season has been light this year, so we anticipate including banked samples as part of our FDA sample submission.
Notably, funding for both the COVID and flu clinical studies is provided by BARDA, Biomedical Advanced Research and Development Authority, a division of HHS and a long-time partner of Cue. For our flu A&B plus COVID multiplex test, we are in late-stage technical development and can detect and differentiate between flu A&B versus COVID. We will continue to optimize this assay's performance. We expect clinical studies to begin in the second half of 2022. This multiplex test does have an EUA pathway that could simplify the clinical and regulatory process versus a standard 510(k). For our RSV test, we are progressing on late-stage technical development and expect to be in clinical studies in Q3. Last year's RSV peak was during the summer. Within our sexual health category, our chlamydia and gonorrhea multiplex test is progressing well.
The chlamydia and gonorrhea multiplex test is in late-stage technical development, and we expect to commence clinical studies for this test in the second half of 2022. We currently have a COVID-19 Omicron-specific test cartridge under review with the FDA. At the request of BARDA, we were able to complete primer design, assay development, and updates to the Cue Health app, and all required studies in a 9-week period. We submitted for emergency use authorization on March 3rd, so we look forward to updating you on progress on that test in the near future. All in all, menu expansion is proceeding at a very fast clip, and we have a robust set of tests showing strong progress that will increase our addressable opportunity.
Combined with significant upgrades we've made and are making to our digital capabilities, which all of our diagnostics results flow seamlessly through, we think we're in pole position to enable a new experience of the healthcare system across many of the most common reasons individuals use the healthcare system. I'll expand further on our digital capabilities growth, a key growth driver, because these capabilities enhance the value and actionability of our diagnostic results. We're investing heavily in and rapidly building the technology enhancements for our integrated care platform. Our software development team has recently been focused on building out the integrations with leading electronic medical record systems, expanding internationally to ex-U.S. app stores, and building the next generation of digital capabilities for Cue, including streamlined test-to-treat workflows that include prescription delivery.
We believe our planned future enhancements will provide an even more comprehensive and seamless digital health experience, including efforts we're making to enable reimbursement directly on our platform. Right now on Cue, you can take a molecular diagnostic test for COVID-19, share your results securely with a physician and visit with them, and they can write a prescription, all without leaving the app. We are getting very close to having our eureka moment of linking diagnostic results with virtual care and the final piece, antiviral and prescription delivery. Our solution for COVID-19 is a major proof point, as this diagnostic, diagnosis, virtual care, prescription delivery format is the heart of our vision for Healthcare 2.0, and will apply to other respiratory products, sexual health infections, and even for managing chronic diseases.
Wouldn't it be great if when your kid has a sore throat, you could just reach for Cue, run an accurate molecular test, and detect strep, talk to a doctor, and have an antibiotic delivered? In summary, with continued expansion of our customer base, test offerings, and software and services, our team is making great strides towards our mission of making healthcare more timely and accessible. As we continue to build out the business, we are excited by what we have in store for the near-term future, and I look forward to updating you on our progress on future calls. With that, I'll turn it over to John to walk through our financial results.
Thank you, Ayub, and good afternoon, everyone. In Q4, we had total revenues of $192.5 million, a significant increase from revenues of $13.3 million in Q4 of the prior year. This was driven by our production capacity ramp, delivery on our initial DoD contract, and expansion of our customer base across all customer categories. Private sector revenues for the quarter grew to 54% or $104 million. This is the first time private sector revenues surpassed the public sector, reflecting growth and diversification in our customer base. Public sector revenues for Q4 were $88.5 million and accounted for 46% of revenues. During the quarter, we completed shipment of our initial contract with the DoD.
Also in the quarter, the expansion of our install base continued as we sold approximately 40,000 readers, bringing our total number of readers shipped to over 160,000 units as of December 31, 2021. Due to the strong demand in the first quarter, as Ayub highlighted earlier, we've now shipped more than 230,000 readers. Please note that as we onboard new customers, and because of the linkage to COVID prevalence, we expect reader sales to fluctuate quarter to quarter. Disposable test cartridge sales in the quarter were $165.4 million. Moving down the P&L, product gross margin was 46.3% for the fourth quarter of 2021, compared to 7.2% in the fourth quarter of 2020.
The increase in gross product margin was driven by higher volumes as we expanded our production capacity throughout 2021. Despite global supply chain constraints, we have been successful in obtaining necessary components and meeting our customers' expectations for supply of our product. Operating expenses were $66.3 million in the fourth quarter of 2021, compared to $19 million in the fourth quarter of 2020. Sales and marketing expense was $21.2 million in the fourth quarter. We have ramped our spend, as planned, with a focus on digital marketing, advertising, and growing our commercial and marketing teams, including launching direct-to-consumer during the quarter. R&D expense was $21.7 million in the fourth quarter. Again, as planned, we have ramped our investment in R&D with a focus on menu expansion and software development.
G&A expense was $23.5 million during Q4. Net income for the fourth quarter 2021 was $34.2 million, compared to a net loss of $19.5 million in the fourth quarter 2020. This translates to diluted EPS of $0.22 in the fourth quarter versus a loss of $1.16 in the fourth quarter 2020. Net income for the fourth quarter reflects an effective tax rate of -44.9%. The negative tax rate in the quarter was driven by tax benefits related to utilization of net operating loss carryforwards and some accelerated depreciation. Moving on to full year 2021. We had revenues of $618.1 million in 2021 versus revenues of $23 million in the prior year.
Private sector revenue accounted for 37.7% or $232.8 million of total revenue, and public sector revenue accounted for 62.3% or $385.3 million during 2021. Disposable test cartridge sales for the year were $490.3 million. Product gross margin for 2021 was 55.1%. Operating expenses were $151.3 million for full year 2021, including sales and marketing expense of $28.7 million, R&D expense of $42.8 million, and G&A expense of $79.8 million. Net income for full year 2021 was $86.4 million, which translates to diluted EPS of $0.59 and reflects an effective tax rate of 27.5%.
Adjusted net income for the year was $164.5 million and translates to an adjusted diluted EPS of $1.21. The non-GAAP adjustments are related to one-time impacts pertaining to our September IPO. Moving to the balance sheet. We ended 2021 with cash of $409.9 million. This cash positions us with a strong balance sheet and the ability to invest in the business and execute on our vision and strategy. I'd now like to move to our guidance. For the first quarter, we expect revenues of $170 million-$180 million. Our business today is highly coupled to COVID rates and resurgences.
For example, the Omicron surge meant we saw strong demand for testing throughout the first half of the first quarter, and more recently have seen a tempering of demand as the number of cases has declined. This makes it difficult to predict how demand will progress throughout the rest of the year, so we are not providing full year revenue guidance, but we plan to give an update on our Q1 call. As Ayub highlighted, we continue to make progress with the expansion of our testing menu into different categories, including, and most near term, respiratory and sexual health. Test menu expansion will diversify the business, and we expect more predictable revenue streams going forward. With that, I would like to thank you for your attention, and I'll now turn the call over to the operator for questions.
Thank you. As a reminder, to ask a question, you'll need to press star one on your telephone. To withdraw your question, press the pound key. We please ask that you limit yourself to one question and one follow-up. Again, we ask that you limit yourself to one question and one follow-up. Our first question comes from Matt Sykes from Goldman Sachs. Your line is now open.
Hey, good afternoon, everybody. Thanks for taking my questions. Appreciate it. Maybe just, Ayub, just to start with you, just on the direct-to-consumer strategy, congrats on getting that out in the fourth quarter. I know there was some adjustment in the pricing strategy that you had initially. Just wondering, as you think about the course of this year and that strategy overall, how much is pricing a lever you think for that strategy to drive additional volumes, in your mind? Or are there other levers that you're gonna be using to continue to drive that forward?
Hey, Matt, thanks for the question. This is John. I thought I'd jump in with the pricing aspect that you have there. Look, the move on pricing was in advance of our Super Bowl advertisement that you heard us talk about on the prepared remarks. That was more about feedback that we've had related to accessibility of our product. It's important to us to make sure that Cue is accessible to as many people that want it as possible, and that's why we're looking at moving the pricing down in advance of that. As it relates to direct-to-consumer, we've been very pleased actually with the uptake that we've seen there. It's still early, having just launched it, you know, in the middle of the fourth quarter.
We've been really happy with the uptake that we've seen. Coincidentally, we did launch it into a time where Omicron came shortly thereafter. We've been pleased with the volumes, but I'd say stay tuned for more on direct to consumer. As it relates to pricing, we're always going to seek to be competitive in the marketplace.
Got it. Thanks, John, for that. Just, you'd mentioned that private sector revenue in Q4 surpassed that of public. Could you just talk about some of the drivers within that, whether it's corporate, direct to consumer, health systems? Is there any main driver there? As you look forward to this year within those subsegments, do you see any big opportunities for you that could continue to drive that private sector revenue?
Yeah. Yeah. That was notable that for the first time, private sector revenue was greater than public. You're right, it represented 54% of our revenue on the quarter. As we look at what some of the key drivers are, a reminder, you know, we have four customer categories, and that's the public sector and the private sector. Within the private sector, there's three categories. It's enterprise, provider, which gives us access to the point of care market, and then direct to consumer. As we look at the acceleration that we saw in the private sector, then it was across all three of the customer categories, enterprise, provider, and of course, we launched direct-to-consumer, so we were getting revenue for the first time there as well.
One thing I'd point out is, you know, what's driving the acceleration, what are we gonna see continuing into the future is, hey, you know, we've increased our customer base. Since the Q3 call, we're now up to more than 220 directly contracted organizations. So that's a significant increase over where we were on the Q3 call. That's, as you would expect, in enterprise and it's centered in provider, where you've seen us make recent announcements with large healthcare networks like Johns Hopkins, University of Pittsburgh Medical Center. Then even last week, for the first time in retail pharmacies with the partnership that we have with Albertsons, which is now gonna be in 900 different retail pharmacies.
That has given us a very good customer base, and that's what's driving the growth that you see in the private sector.
Great. If I can squeeze in one more, just on the public sector. There's obviously been some news regarding federal-level funding for COVID, but it seems like you've been able to pivot towards states and other levels of public sector opportunities. Could you maybe talk about how your public sector strategy may pivot over the course of the year, just given the funding environment, which may change or be dynamic throughout the course of the year?
Yeah. As you look at the public sector, you're right, Matt. We completed the delivery on the initial contract, which allowed us to deliver 6 million test cartridges and 30,000 readers, which created a large installed base for us in the public sector. We completed the delivery on that in Q4. What we've been seeing is that we're getting engagement directly from the states, which is, as we would expect, related to having a durable installed base across the public sector. While it's still early and it takes time to have direct engagement with these states, we're seeing the right demand signals coming in and playing off of the installed base in the public sector.
Great. Thanks. Appreciate the time.
Thanks for the questions, Matt.
Thank you. Our next question comes from Tejas Savant, from Morgan Stanley. Your line is now open.
Hey, guys. Good afternoon, and thanks for the time here. Maybe, John, just to kick things off on the first quarter guide here, can you give us a sense for what the mix of public versus private sector assumed in the guide is? Secondly, in terms of, you know, I think you mentioned sort of not giving the full year guide just yet, given some of these, you know, COVID trends here, I'm assuming that implied sort of a month-over-month decline through in terms of your January through March trends here. Would you be able to give us sort of an exit run rate for revenue in March, even though you're stopping shy of giving a formal guide here?
Yeah, Tejas. Thank you. Thanks for the questions. First on the private versus public, I think you know, but we're in an RFP process with DoD, and that process is ongoing. We don't have an update actually on that process related to this phone call today. But what I would tell you is that when you look at the mix, because we've delivered the initial contract in Q4, that with the guide on Q1 of $170 million-$180 million is almost entirely private sector. It's notable actually, you know, pertaining to the prior question, private sector revenue in Q4 was $104 million. As we're looking at this guide on Q1, it's $170 million-$180 million, which is almost entirely private sector.
Significant growth across these key customer categories that I was just mentioning. As you think about the no guidance on the year and how to think about the quarter, yeah, I mean, look, for now, our revenue achievement is tied to COVID prevalence, as we know, and COVID isn't predictable. What you did hear me say, though, is, you know, the beginning of the first half of the first quarter, we had higher volumes. As we're exiting Q1 right now, the volumes are lower. Not gonna be able to, you know, guide what that translates to, but we're certainly at a time right now where COVID testing volumes are a bit lower as we exit the quarter.
Got it. That's helpful. As we think about the rest of 2022, I mean, I think Ayub, you mentioned in your prepared remarks, going live in Canada and Singapore today. I believe India is also in the mix here. How are you thinking about a revenue contribution from you know OUS cumulatively over the course of this year?
The way we think about international expansion is, look, we have a value proposition and vision of how we wanna deliver healthcare. We think that the need is consistent globally, meaning everybody wants to have accurate diagnostics that they could leverage to have a more meaningful virtual care conversation and then ultimately get treatment. We think that's a universal sort of customer need, and it's global. That's one element. The other element from a business strategic perspective is that, you know-
Not only with COVID, but some of the respiratory elements, they're gonna have an element of seasonality to it. As a result, you really wanna be in the Northern Hemisphere, you wanna be in the Southern Hemisphere, you wanna be in different countries to mitigate sort of the demand pattern. Long term, we wanna have a, you know, good commercial operations internationally, not only because it's, you know, basically executing on our vision, which we think is global, but also because it helps mitigate some of the seasonality we see in some portions of the menu.
Got it. That's helpful. I'll just squeeze in a third one here. You know, one of the salient features of your business model here is the onshore manufacturing, and you're pretty scaled up there. Ayub, can you walk us through two things. I mean, one, there's this you know input cost sort of pressures here, which everyone is going through. What does that mean for you guys having your manufacturing in-house and already scaled up? Second, as we think about you know the supply chain environment and the ongoing sort of risks there, can you just give us a sense for the degree to which you have all the raw materials that go into the manufacturing process?
Are you building up sort of sufficient inventory to cater to, you know, sort of these real-time changes in demand based upon COVID in the near term?
You know, one of the things that we've invested heavily in over time is really automation. Automation meaning like the automated assembly of our cartridges with minimal human input. That's been really very important for us from a quality perspective, a predictability of scaling up. It makes it so that you know, onshoring production made a lot of sense because we, while we've created a lot of jobs, you know, over 1,500 here, we also want to have a good cost structure, and the automated manufacturing allows us to do that. With regards to the actual supply chain, you know, the operations team has done an excellent job creating geographical redundancy on various components.
Because when we created Cue, when we started Cue, we understood that a part of the business was gonna be related to pandemics and we would need to have a lot greater control over our own supply chain. Not only have we onshored big parts of it, the vast majority, but we've also create a lot of our own critical components like our enzymes and our primers. Having that capability has really served us and has allowed us to see the type of growth and scale that you saw going from, you know, $20 million in revenue to $600 million in revenue in the course of one year. That's all because of the investments that we made pre-pandemic and because of the excellent execution following that.
We definitely see that the global supply chains are in turmoil, and we see that, you know, with what is happening in China with COVID, that there's a lot of difficulty ahead. But for most companies, we think we're in a robust situation because of the investments we've made, you know, onshoring and also scoping in a lot of the work that needed to be done and just owning the vertically integrated manufacturing element.
Got it. Super helpful. Thank you.
Thank you. Our next question comes from Charles Rhyee from Cowen. Your line is now open.
Yeah. Hey, thanks for taking the questions. Appreciate it. Maybe I could ask a little bit about the one you got a little differently. You know, you talked about the Albertsons partnership, assigning them, plus the 220 new customers. You know, maybe first a point of clarification. John, you mentioned now you shipped over 230,000 readers. I think I heard you say at the end of the fourth quarter, you were at 160,000 readers. So does that mean we shipped 70,000 here in the first quarter?
Hi, Charles. Yes. Yeah, your math is correct on that. Our installed base is now more than 230,000 readers shipped through the quarter, that is. That's correct.
Okay. That's helpful. If we think about the first quarter guide, you know, is it fair to think that part of that is shipping both readers and, you know, cartridges to places like Albertsons to set up for, you know, these kind of new partnerships? Or, you know, like how much would you say is that relative to readers already in the market and people, you know, using and ordering, you know, new cartridges?
Related to your question, Charles Rhyee, on readers. The way to think about it is readers represent our install base, but they don't represent a large proportion of our overall revenue dollars. You know, as we look at it, readers on a quarterly basis generally represent anywhere between 5%-10% of revenue. I don't think you should think about the Q1 guide as $170 million-$180 million with a large portion of it being readers. In fact, you know, it's gonna continue to be predominantly cartridge revenue from new customers, and we highlighted the new customers that we've added, as well as from existing customers and the reorder rates that we've had from them on the contracts that they have in place.
Okay, that's helpful. With those new clients, are there any kinda upfront cartridge purchases? Or I guess more importantly, as we think about post Q1, are there any kinda minimum cartridge purchase requirements built into your contract so you have some visibility on forward revenue, particularly on the cartridge side?
Yeah, Charles. So, we've got a mix. Our business is a mix of a la carte business that people are buying at will, and then we've got a mix of people that are on contract, both short-term and longer term in nature. You know, what we've seen is the buying patterns are adhering to the contracts that we have in place. As mentioned earlier, we're also seeing our revenue achievement tied to the prevalence of COVID. Those volumes were higher in the first half of the quarter, and as we exit the quarter, those volumes are lower. That's not a surprise to anybody here, I don't think. You should view the $170 million-$180 million as being a mix of both of that.
Appreciate it. Maybe if I can sneak one last. You talked about an Omicron-specific assay. Does that also is that also able to detect that, the, this new BA.2 variant as well?
Yeah. The Omicron specific test is definitely able to detect BA.2 in addition to BA.1. Where we think it could be useful is in distinguishing from, you know, Omicron versus what was in the past and also what's in the future, because the therapies, as we've seen, are actually variant-specific in a pretty significant way. Most of the monoclonal antibodies stopped working with Omicron BA.1 and the rest started failing with Omicron BA.2. Paxlovid, on the other hand, still is working for both strains and/or variants, and then we'll have to see what comes next after Omicron, and that could help guide. This genotyping assay for Omicron could help guide the therapy decisions, once available.
Great. Thanks, guys. I appreciate it.
Thanks, Charles.
Thank you. Ladies and gentlemen, if you have a question, that is star one. Again, if you have a question, that is star one. Our next question comes from Mark Massaro from BTIG. Your line is now open.
Hey, guys. This is Vivian on for Mark. Thanks for taking the questions. You've spoken about your manufacturing lines and processes remaining consistent, to accelerate approval. Could you maybe provide some color on which of your pipeline offerings, you're placing the highest priority on, in the near term? Maybe also remind us on the pricing of those. Thanks.
The menu expansion is definitely a parallel process sort of thing. We have, you know, team members who are dedicated to one assay versus another assay. You know, we've identified a set of them that are very important and that are near-term. Fleshing out the respiratory category, fleshing out the sexual health category, those are really near-term priorities because it fits in this really important model of going from diagnosis to talking to doctor to getting the treatment. You know, all of these have that sort of structure available, meaning there's treatments for almost all of them. We don't think of like, you know, a rank order system for them. We think of as a category, these are the ones that we really wanna pursue, and let's pursue them in parallel.
You know, as an example, the Omicron test was a very short development cycle for us, and it's a good example. It's a good demonstration of our capability. You know, we've really built a modular system that is able to be updated very quickly, and with the milestones we laid out across the different tests that we have in our development pipeline, I think that shows that we're executing really well on the R&D side, and the clinical study side as well.
Okay.
As it relates to the other part of your question on price, as we roll out our menu expansion tests, we're gonna seek to be competitive on what the price points are out in the marketplace on tests like those. You know, we've got the P&L to be able to do that. You know, we've got a strong gross margin profile. We've got the ability, as you've seen us do, to be able to adjust price when necessary. When we look at menu expansion, we're gonna seek to be competitive on any and each of the tests that we roll out.
Okay, great. If I could just add a follow-up. Could you briefly comment on gross margins? I know there's been talk of inflationary and supply chain pressure. How should we be thinking about your prior target of 60% margins by 2023?
Yeah. We're not guiding on the margin today, but I think part of your question is, though, we were 46% in Q4, that's down from 60% what it was in Q3. What's driving that? The answer to that question is a couple of things. It's really twofold. One is cost increases. You heard us talk a little bit about navigating the global supply chain constraints. As it relates to our cartridges and our readers, we have been successful in obtaining the components that we need to fulfill all of our customers' orders and expectations, which is great, but we have had to pay up a little bit for that, and that's reflected in the margin.
That's as it relates to materials, as it relates to freight and the like. That's one component of what you see with the 46% gross margin on Q4. Then the other component is customer mix shift. We highlighted that the private sector is now in the quarter with 54% of our total revenue achievement, and that's great. It's good customer diversification, and we talked about the expansion of our customer base. As it relates to the margin, there is as we do that mix shift, and we shift more to private sector and away from public sector, then there's less deferred revenue that's recognized, and deferred revenue has a higher gross margin. When you take those two things together, that's what's reflected in the 46%.
Okay, great. Thanks for taking the questions.
Thank you.
Thank you. I'm showing no further questions. This concludes today's conference call. Thank you for participating. You may now disconnect.