Good afternoon. I will be your conference operator. At this time, I would like to welcome everyone to the Applied Optoelectronics Fourth Quarter and Full Year 2019 Earnings Conference Call. All participants have been placed on mute to prevent any background noise. Should you need assistance, please signal a conference specialist by pressing the star key followed by zero on your telephone keypad. After today's presentation, there will be an opportunity to ask questions.
To ask a question, you may press star then one on your telephone keypad. To withdraw your question, please press star then two. Please note this event is being recorded. I will now turn the call over to Lindsay Savarese, investor relations for AOI. Ms. Savarese, you may begin.
Thank you. I'm Lindsay Savarese, Applied Optoelectronics investor relations, I am pleased to welcome you to AOI's fourth quarter and full year 2019 financial results conference call. After the market closed today, AOI issued a press release annnouncing its fourth quarter and full year 2019 financial results and provided its outlook for the first quarter of 2020.
The release is also available on the company's website at ao-inc.com. This call is being recorded and webcast live. A link to that recording can be found on the investor relations section of the AOI website and will be archived for one year. Joining us on today's call is Dr. Thompson Lin, AOI's Founder, Chairman, and CEO, Dr. Stefan Murry, AOI's Chief Financial Officer and Chief Strategy Officer.
Thompson will give an overview of AOI's Q4 results, and Stefan will provide financial details and the outlook for the first quarter of 2020. A question and answer session will follow our prepared remarks. Before we begin, I would like to remind you to review AOI's safe harbor statement. On today's call, management will make forward-looking statements.
These forward-looking statements involve risks and uncertainties as well as assumptions and current expectations, which could cause the company's actual results to differ materially from those anticipated in such forward-looking statements. In some cases, you can identify forward-looking statements by terminology such as believes, anticipates, estimates, intends, predicts, expects, plans, may, should, could, would, will, or thinks, and by other similar expressions that convey uncertainty of future events or outcomes.
Forward-looking statements also include statements regarding management's beliefs and expectations related to the expansion of the reach of our products into new markets and customer responses to our innovations, as well as statements regarding the company's outlook for the first quarter of 2020. Except as required by law, we assume no obligation to update forward-looking statements for any reason after the date of this earnings call to conform these statements to our actual results or to changes in the company's expectations.
More information about other risks that may impact the company's business are set forth in the risk factors section of the company's reports on file with the SEC, including the company's annual report on Form 10-K for the year ended December 31st, 2018. Also, with the exception of revenue, all financials discussed today are on a non-GAAP basis, unless specifically noted otherwise.
Non-GAAP financial measures are not intended to be considered in isolation or as a substitute for results prepared in accordance with GAAP. A reconciliation between our GAAP and non-GAAP measures, as well as a discussion of why we present non-GAAP financial measures, are included in our earnings press release that is available on our website.
Before moving to the financial results, I'd like to announce that AOI management will present at the Raymond James Institutional Investor Conference on March 3rd and will host an investor session at OFC on Tuesday, March 10th, at the San Diego Convention Center. This discussion will be webcast live and a link to the webcast will be available on the investor relations section of the AOI website. We hope to have the opportunity to see many of you there.
Additionally, I'd like to note the date of our first quarter 2020 earnings call is currently scheduled for May 7th, 2020. Now I would like to turn the call over to Dr. Thompson Lin, Applied Optoelectronics Founder, Chairman, and CEO. Thompson?
Thank you, Lindsay, and thank you everyone for joining us today. We deliver revenue in line with our guidance range and achieve better than expected results on the bottom line. AOI delivered Q4 revenue of $48.7 million, non-GAAP gross margin of 27.6%, and a non-GAAP net loss of $0.18 per share. During the quarter, the data center demand environment remained consistent with our expectations.
While we are continuing to see improved order pattern among two of our hyperscale data center customers, we remain cautiously optimistic as demand continues to stabilize among our customers. We are pleased to report that we recently received a design win for our 400G product with a Tier 1 network equipment manufacturer, and we are encouraged by the customer interest we are seeing with this product. In CATV, the overall CATV demand environment continued to be soft.
While we expect this condition to influence our performance in the near term, we believe AOI remain well-positioned given our innovative technology as MSO move to next-generation architectures. We continue to make good progress in diversifying our customer base, and during the quarter, we secured nine design wins, with eight out of nine design wins coming from new customers. We had 31 total design wins for the year, which is nearly 20% higher than our total design wins in 2018.
We believe that this multi-year trend of new customer design wins activity reflects favorably on our technology roadmap and manufacturing execution, but also demonstrates the ongoing success of our strategy to extend sales beyond our core hyperscale customer base. Before turning the call over to Stefan for additional details and our outlook, I would like to first address the coronavirus outbreak.
As a result of the COVID-19 outbreak in China, we experienced change in our operations there in Q1. Our operation in Ningbo was shut down for approximately two and a half weeks beyond our normal Lunar New Year holidays. We are currently up and running again at approximately 70% of our normal capacity, which is improving steadily as our staff is able to return to work.
In order to reduce the impact of the shutdown on our customers, we have taken measures to increase production at our factory in Taiwan and in the U.S. While we anticipate reduced revenue and some additional expense in Q1, we are working hard to minimize these impacts. We have included our current estimates of the impact in our guidance. However, I will caution that there are still significant unknowns with respect to the extent and duration of the impact to our operation.
At this point, we expect that these issues will be temporary as the situation in China gradually gets back to normal. Stefan will provide additional detail. I wish at the time to thank our staff and leadership in China for their dedication in dealing with this rapidly evolving situation. Our thoughts go out to all those individuals in China and around the world who are suffering from this illness. We are encouraged by the traction we are seeing with our 400G products and the continued signs of recovery from several of our data center customers.
Also, we continue to be pleased with our design wins. We remain focused on delivering innovative technology to our customer and are well-positioned to capitalize on opportunities ahead of us as the market improve. We are looking forward to showcasing our technology solution and meeting with many of you at OFC next month. With that, I will turn the call over to Stefan to review the details of our Q4 performance and outlook for Q1. Stefan?
Thank you, Thompson. Our Q4 financial performance and demand environment were broadly in line with our expectations. Total revenue for the fourth quarter was $48.7 million, which was at the high end of our guidance range. Our data center revenue came in at $39.3 million, compared with $42.6 million in Q4 of last year.
In the fourth quarter, 49% of our data center revenue was from our 40G transceiver products and 42% was from our 100G products. As Thompson mentioned, we are pleased to report a design win for our 400G product with a Tier 1 network equipment manufacturer, which we received subsequent to quarter end, and are pleased with the interest and customer engagement that this product is generating.
We remain in active qualification with other customers for their 400G data center transceiver needs and look forward to additional design wins as these activities culminate over the next few quarters. Data center market dynamics played out similarly to the last few quarters, with a slight improvement in Q4 compared to Q3.
We are continuing to see a modest recovery among two of our hyperscale data center customers, while one customer continues to purchase product from us but with reduced demand. Looking ahead, we remain cautiously optimistic about the demand picture in the near term. We had seven design wins in the quarter in our data center segment, with four out of the seven wins coming from a new data center operator customer. We are very pleased with this new customer traction and expect to begin generating revenue from this new relationship this quarter.
Turning to our cable television product segment. Revenue from CATV products was $6.8 million compared to $12.7 million in Q4 of last year, primarily driven by weakened demand from our North American MSO customers. We continue to believe that MSOs are delaying upgrades, pending the availability of new technologies such as DOCSIS 4.0.
Looking ahead, we believe this environment will continue through the first half of this year, driven by demand dynamics we discussed and coupled with typical seasonality. While we believe these conditions will impact our near-term outlook, we believe that AOI remains well-positioned as these new technologies roll out given our key technologies like Remote PHY. Revenue from our telecom products was $2.2 million compared to $2.8 million in Q4 of last year, in line with our expectations.
Primarily driven by a decrease in sales of certain legacy products, partially offset by increasing sales of newer products, such as those designed for 5G network deployments. In addition to the seven design wins in the data center segment, we had one design win in our telecom segment during Q4. This design win is with a network equipment manufacturer of 5G networking equipment.
For the quarter, 81% of our revenue was from data center products, 14% from CATV products, with the remaining 5% from FTTH telecom and other. In the fourth quarter, we had two 10% or greater customers, both in the data center market, that contributed 39% and 28% of total revenue respectively. For the year, we had four 10% or greater customers, three in the data center segment that contributed 32%, 24% and 11% respectively, and one in the CATV market that contributed 10% of total revenue.
In total, for the fourth quarter, we secured nine new design wins among six customers, five of whom are new to AOI, bringing our total design wins in 2019 to 31, up from 26 design wins in 2018. We made good progress this year in diversifying our revenue base with a declining revenue concentration.
The concentration of revenue among our top 10 customers decreased from 92.9% in 2018 to 88.1% in 2019. In Q4, our top 10 customers combined to account for 87.5% of our revenue, compared to 91.5% of our revenue in Q4 last year. In Q4, we generated a gross margin of 27.6%, up from 24.7% in Q4 of last year, and within our guidance range of 26.5%-29%, primarily driven by operational efficiencies and a favorable product mix.
Total operating expenses in the quarter were $19.4 million, or 39.9% of revenue, compared with $18.7 million, or 31.8% of revenue in the same quarter last year. We had $0.3 million in direct economic incentives from the Chinese government in Q4. Operating loss in the fourth quarter was $6 million, compared to an operating loss of $4.2 million in Q4 last year.
GAAP net loss for Q4 was $35.4 million, or a loss of $1.76 per basic share, compared with GAAP net loss of $8.6 million, or $0.43 per basic share in Q4 of last year. The increased net loss was primarily driven by a valuation allowance against certain of our deferred tax assets totaling $25.7 million.
On a non-GAAP basis, net loss after tax for Q4 was $3.6 million, or a loss of $0.18 per basic share, which was favorable to our guidance range of a loss of $4.3 million to $5.9 million, or $0.21-$0.30 per share, and compares to a net loss of $0.5 million, or a loss of $0.02 per basic share in Q4 of last year. The basic shares outstanding used for computing the net loss in Q4 were 20.1 million.
Turning now to the balance sheet. We ended the fourth quarter with $67 million in total cash equivalents, short-term investments, and restricted cash. This compares with $72.4 million at the end of Q3 and reflects $3.2 million in cash used for operations. As of December 31, we had $85 million in inventory compared to $82.1 million in Q3.
The increase in inventory was mainly driven by inventory buildup ahead of the Lunar New Year. Although this was planned, we believe this extra inventory will be useful to us as we continue to recover normal operations following the coronavirus shutdown. Longer term, we continue to believe that inventory levels will rationalize.
We made a total of $5.2 million in capital investments in the quarter, including $2.2 million in production equipment and machinery and $2.7 million on construction and building improvements. Capital expenditures in 2019 of $37.6 million were below our expectations of $46 million. The difference was primarily related to delays in the construction of our plant in China. We expect most of these expenses to be incurred in 2020, although the timing within the year is still uncertain due to the coronavirus.
As Thompson mentioned, the COVID-19 outbreak in China continues to affect our operations there, although the situation is gradually returning to normal. Our factory in Ningbo is not located near the epicenter of the disease, like many cities in China, the government there ordered all factories shut down for an extended period following the Lunar New Year. In total, we were shut down for approximately two and a half weeks beyond our normal holiday period.
We have resumed operations there are already operating at 70% of our normal capacity, which is improving steadily as staff are able to return to work. As far as financial impact, there are three areas that we are monitoring. One, reduced manufacturing capacity in the quarter due to the shutdown and lower than typical headcount in the factory. Two, additional expenses incurred as a result of the outbreak.
Three, supply chain issues. As many of our suppliers are in China, we are working closely with them as they return to work to assess whether they will be able to supply necessary raw materials for our production. At this point, the vast majority of our suppliers in China have returned to work, and we currently believe that we will not have constraints on our production capacity in Q1 due to virus-related supply chain disruption. In order to reduce the impact of the shutdown on our customers, we have taken measures to increase production at our factories in Taiwan and in the U.S.
The flexibility that we have in maintaining multiple manufacturing locations is an essential part of our strategy. Our ability to ramp production outside of China has allowed us to offer product to certain customers whose regular suppliers were more acutely affected by the virus than we have been. Our production cost in Taiwan and the U.S. are typically higher than in China.
This may also temporarily pressure margins. As China returns to full operations, we anticipate this margin pressure will be short-lived. While we have many challenges in dealing with this very fluid situation, we feel that our diversified manufacturing strategy and relatively high level of automation have allowed us to address these challenges proactively. Moving now to our Q1 outlook. We expect Q1 revenue to be between $43 million and $47 million, and non-GAAP gross margin to be in the range of 23%-25%.
Non-GAAP net loss is expected to be in the range of $6.8 million - $8.3 million, and Non-GAAP loss per share between $0.34 per share and $0.41 per share, using a weighted average basic share count of approximately 20.3 million shares. With that, I will turn it back over to the operator for the Q&A session. Operator?
We will now begin the question and answer session. To ask a question, you may press star, then one on your telephone keypad. If you are using a speakerphone, please pick up your handset before pressing the keys. If at any time your question has been addressed and you would like to withdraw your question, please press star, then two. At this time, we will pause momentarily to assemble our roster. The first question comes from Samik Chatterjee of JP Morgan. Please go ahead.
Yeah. Hi, guys. Thanks for taking my question. This is actually Bharat on for Samik. The first question I had on the data center side, it looks like the 100G revenues were up sequentially quite a bit, and then, if I'm not wrong, you highlighted three data center customers that were greater than 10%. That one large hyperscale customer that we had talked about in the last call that had a higher inventory and was at reduced spending levels. Are you seeing that return to normal, and are you seeing normal CapEx levels return from that customer?
Just to clarify, during the quarter, we had two 10% or greater customers in the data center segment, that were 39%.
Okay
28%, respectively. Not three, but two. We did have for the year, we had three data center customers, just to clarify. Two in the fourth quarter and three for the year. I would say as we noted in our prepared remarks, two of our data center customers are increasing their orders, and one continues to order from us, but with a reduced level from what it had been historically.
Okay. Yeah. Thanks for that. Then, one follow-up I have is the new 400G design win that you talked about. Can you quantify probably the magnitude of that, and how should we think about the benefit of that coming through? Do you expect that meaningfully starts to benefit the revenue towards the later half of this year, or that's more a 2021 kind of story? Thanks.
We may see some contribution late this year. I'm expecting it, frankly, to be more of a 2021 ramp, but it could come as early as later this year, depending on how things play out. This particular win is a sizable opportunity for us. I think more than the absolute dollars that could come from this win, I think it really is a testament that the technology that we have is playing well with customers.
As we noted in our prepared remarks, we have a number of ongoing qualifications with other customers, and I think this provides some tangible evidence that the product is working as intended and customers are accepting the product and the pricing and other aspects of the product that we have. We think it demonstrates our capabilities, and we're excited about the other qualifications that we have ongoing now.
Yep. Great. Thanks for taking my question. Thank you.
My pleasure.
Once again, if you have a question, please press star, then one on a touch-tone phone. The next question comes from Joe Flynn of Craig-Hallum. Please go ahead.
Hi, guys. I'm on for Richard Shannon. Just a quick question regarding the 400G product. Would you be able to tell us if it's a four-channel or eight-channel product design?
It's a four-channel design.
Okay, thanks. I guess looking out forward, what does the path to breakeven look like? Anything to offer maybe on sales levels, gross margin, maybe the main market drivers that will get you there?
Yeah, I think, obviously, there's a couple of different knobs that we can turn. One is increasing gross margins, and the other is increasing revenue. I think our operating expenses are likely to be relatively well-controlled at around this level. On a quarter-by-quarter basis, they may bounce around a little bit, but overall, I don't expect major changes in our operating expenses at this point. Really it comes down to revenue increase and gross margin.
I think as far as revenue contribution, I think the main factors that we expect to see are improvement, especially in the back half of the year in our cable TV market. Q1 is always a seasonally down quarter for us in cable. As we noted in our prepared remarks, we're also at kind of a nadir in terms of industry revenue.
I believe, at least from the commentary that I've heard from other companies in the industry so far this reporting season, it seems like revenues are generally depressed across the cable TV space. We do believe that several MSOs are in the process of contemplating or making plans to begin upgrades later on in the year.
That should be good for the industry as a whole and, hopefully, AOI in particular participating in that. We do think some of our newer technologies, like R- PHY, and some of our other newer products for the cable space could contribute positively to both, obviously, revenue and gross margins as well. That's one factor, I think, that could lead us to improving conditions. The other is continued growth in our 100G data center products. As you noted, our 100G-- Sorry, it wasn't you.
It was a previous question noted that the 100G was up sharply. It was nearly double what it was last quarter. As long as that trend can continue, I think that's positive for us. It portends revenue growth as well. 400G, as I noted in my answer to the previous question, is likely to be not that big a contributor in 2020, but longer term, could meaningfully contribute to both revenue and gross margin.
Then the 5G network build-out. Currently, I think with the coronavirus, that does put a little bit of a question mark on the pace of roll-outs, particularly in China, where some of the early roll-outs were expected to happen. Nevertheless, I think over the longer term, as we move past the virus-related concerns, that certainly should be positive for us in terms of revenue growth.
We also think it could be positive in terms of gross margin. It depends a little bit on product mix there, but there's opportunities where we can extract higher gross margins, certainly than our current levels there. Those are all the kind of knobs that we expect to turn and the market dynamics that are playing out. Overall, I think we're pretty optimistic that data center recovery is underway.
Cable TV's still not recovering yet, but I think there's reason to be optimistic about the back half of the year. Then 5G should be a contributor to us as well. All three of those things are kind of pointing in the right direction, if not immediately evident in this quarter.
All right. Thanks. That's all for me.
Okay. Thank you.
Again, if you have a question, please press star then one on a touch-tone phone. At this time, we have no further questions, and I will turn the call over to Dr. Thompson Lin for closing remarks.
Again, thank you for joining us today. As always, thank you to our investors, customers, and employees for your continued support, and we look forward to see many of you at our upcoming investor conference at OFC.
The conference has now concluded. Thank you for attending today's presentation. You may now disconnect.