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Operator
Greetings. Welcome to the Champions Oncology fourth-quarter fiscal year 2021 earnings call. (Operator Instructions) Please note this conference is being recorded. I will now turn the conference over to your host, Dr. Ronnie Morris, CEO. Dr. Morris, you may begin.
Ronnie Morris - President & CEO
Good morning. I'm Ronnie Morris, CEO of Champions Oncology. Joining me today is David Miller, our CFO. Thank you for joining us for our fiscal year-end 2021 earnings call. Before I begin, I'll remind you that I will make forward-looking statements during this call and that actual results could differ materially from what is described in those statements.
Additional information on factors that could cause results to differ is available on our Form10-Q and Form 10-K. Reconciliation of the non-GAAP financial measures that may be discussed during the call to GAAP financial measures is available in the earnings release.
Overall, we've had another year of significant progress successfully expanding our business and core capabilities while continuing to evolve and deliver on our longer-term strategy. I would like to key in on our strategy that we embarked on some exciting and transformational times. Since the inception of Champions, we had clear appreciation for the value contained within the rare data set that we were building.
Our tumor bank and the information we create are unique for several reasons. First, unlike most other tumor models used in research, our models are highly representative of tumors present within a clinical setting. This means that the data sets established using our models provide more accurate and relevant insights. Second, our approach to using a living tumor bank of PDX model means that we have a perpetual source of tumor, allowing for a continuous and a deep level of characterization.
Specifically, we can establish multiple drug response data sets from the same tumor or reinterrogate these tumors with newly approved drugs or drug combinations. We can also fully characterize the molecular nature of these tumor using multiple analytical methods. As new technologies emerge or are optimized, such as proteomic analysis, we can acquire and integrate this new data into our existing information.
Third, by leveraging a living tumor bank of PDX models, we can manipulate these tumors, and simulate important therapeutic or molecular scenarios that are otherwise unavailable in other tumor models. This combination of the unique tumor bank and the phenotypic, genotypic, and response information, combined with our operational excellence, have been key elements behind our ability to aggressively grow our services.
The value of information we produce have been proven by the growth in our services business. More than 500 pharmaceutical and biotech companies have used and relied on the data we created for them across thousands of studies. They have used information in both preclinical and clinical setting to identify targets, look for early signs of efficacy, identify sub-population, and look for mechanisms of action for their drug program.
While we always knew that the data sets we amassed was unique and valuable, we were laser focused on expanding our platform services business and becoming a profitable company. After achieving profitability, we started looking for additional business models that would allow us to leverage our information in higher value, higher margin business that will accelerate our revenue and long-term profit growth. We started this transition last year with the rollout of a new software platform that would allow customers to derive additional value from our PDX information.
Lumin is a revolutionary data interpretation software capable of analyzing proteomic, genomic, and transcriptomic data sets in real time, providing scientists the ability to gain novel insight at their fingertips. The power of Lumin is in the ability to explore data assembled form our PDX models as well as over 20,000 cancer data sets that includes thousands of clinical treatment responses not available at any public sets.
We've been licensing this platform to our customers using a SaaS model. And the uptake has been exciting. Both large and small companies are represented in the customers that have used this platform's range of analysis and visualization tools in all stages of drug development. To demonstrate the combined power of our information and our Lumin analytical tool, we have developed in-house computational target discovery expertise to interrogate our data sets using Lumin's capabilities.
This team, which relies heavily on AI and machine learning algorithms has been able to use our deeply characterized data set to discover novel and therapeutic targets. Computational approaches have emerged as essential mechanisms for target discovery in recent years. This approach has the potential to reduce the time required for target discovery and increase with the scale, which new drug programs can be initiated.
However, these computational approaches often suffer from the poor quality of the underlying data set that is available for mining. Our computational approach leverages a more complete data set that is derived from tumor (inaudible) with a more authentic tumor cell biology and heterogeneity. And as a result, our computational analysis identify targets that are overlooked or missed when using other data sets.
The extensive preclinical platform available in our labs also allows us to take the computationally derived targets and quickly and efficiently validate them. To date, we have validated more than six interesting targets and we are in the process of advancing those targets through a development pipeline. We plan to invest between $2 million and $4 million dollars over the next two years to bring some of these targets forward to the IND-enabling stage.
We have many options to advance the novel targets, which includes partnering, licensing, or internal development. Depending on how far we want to take the compound forward before finding a partner, we think each compound could generate upfront payment with milestone and royalty payments on the backend. We are still early in this process, but the interest we received from discussions with the potential partners is exciting. While we plan to continue to grow the profitability of our services business, we have increased our R&D spending, which is primarily due to investments made in the discovery and validation of therapeutic targets in addition to the continued development of the Lumin software.
In summary, we are evolving our business model to capture more of the value from the proprietary data that we created. To affect this transformation, we reorganized the company into a dynamic ecosystem of business units centered around the world-leading oncology research center that is based off of our unique data and experimental platform. We continue to focus and be excited about our growing core services business.
In addition to our services business, we have added an innovative [fat] business. And an AI-powered target discovery drug initiative. While both new opportunities are still in the early stages, they are growing their potential and excitement throughout the organization. Now let me turn the call over to David Miller for a more detailed review of the financial result
David Miller - CFO
Thanks, Ronnie. Our full results on Form 10-K will be filed with the SEC on or before July 29. Overall, we had another year of significant financial progress and success. We continue to grow our revenue in our core research service business, and we're anticipating contribution from newly launched platforms, such as Lumin, going forward. We currently have more than 75 unique users, and we're looking for that number to grow in fiscal year 2022.
Our full-year revenue for 2021 was a record $41 million compared to $32 million for 2020, representing year-over-year growth of 28%. Income from operations was $338,000 compared to a loss of $1.9 million in the year-ago period. Excluding stock common depreciation, we recognized income from operations of $2.1 million compared to a loss of $100,000 (sic - see press release, "$111,000") a year ago. Turning the focus to the fourth quarter, revenue increased to approximately $10.6 million compared to $8.8 million in the year-ago period, an increase of $1.8 million or 21%.
As discussed on our prior earnings calls, fourth-quarter revenue will be impacted by studies completing earlier than projected and the associated revenue was recognized in the third quarter, leading to the slight decline in quarterly sequential revenue. We recognized a loss of $456,000 for the quarter compared to a loss of $2 million in the year-ago period. Excluding stock-based comp and depreciation, we recognized a small fourth quarter gain of $7,000 compared to a loss of $1.2 million in the year-ago period.
Turning to expenses, excluding stock comp and depreciation, our cost of sales was [$5.6 million] for the fourth quarter of fiscal 2021 versus [$5 million] for the same period last year, an increase of [$621,000] or [12%]. The increase was primarily due to two factors. The first was an increase of approximately [$400,000] in costs related to clinical flow studies with a portion of this expense recognized in advance of any revenue.
The second was the increase in our rent expense as we expanded our lab space during the quarter. This move should provide the additional capacity to match our expected growth. It will result, however, in additional rent expense of approximately $250,000 per quarter. As a result of these factors, there was added pressure on our gross margin for the quarter, which finished at 47% compared to 43% in the year-ago period.
As we move forward, we expect improving margins for a few reasons. First, as these flow studies complete, the revenues will be recognized for some of the cost already recorded. Additionally, we will leverage our new fixed-rent costs against increasing top-line revenue.
Sales and marketing expense was $1.4 million (sic - see press release, "$1.5 million") compared to $1 million (sic - see press release, "$1.1 million") in the year-ago period. For the year, sales and marketing expense was $5.3 million (sic - see press release, "$5.5 million") compared to $4 million (sic - see press release, "$4.2 million") in the year ago period. The increase was mainly due to compensation expenses resulting from commissions earned and salary expense as we continued the expansion of our business development team, including the creation of a dedicated Lumin sales group.
Looking ahead to this year, we anticipate a continued expansion of the business development team and marketing efforts. R&D expense for the quarter was approximately $2.1 million compared to $1.8 million in the year-ago period, an increase of $250,000 or 14%. As Ronnie outlined, we've embarked on a path to increase our R&D spend to invest in transformative opportunities for the company. That spend has begun, and we anticipate quarterly R&D expenses to be in the $2 million range for fiscal year 2022.
For the year, R&D expense was $7.2 million compared to $5.8 million last year, an increase of $1.4 million or 23%. Our G&A expense was $1.5 million (sic - see press release, "$1.8 million") compared to a $2.2 million (sic - see press release, "$2.5 million") in the year-ago period. The decrease was mainly due to the one-time payment in Q4 2020 to our CEO for salary not taken in prior years.
Excluding the one-time catch-up payment, G&A remained flat from the prior year fourth quarter. And for the full year, excluding the aforementioned payments, G&A expense increased $300,000 or 10%. While G&A will nominally increase due to the overall company growth, it should continue to decline as a percentage of revenue over the year.
Now turning to cash, we ended the year with $4.7 million cash on the balance sheet. For the quarter, cash used in operations was $2 million, mainly due to the normal variability in the timing of accounts receivable and an increase in prepaid expenses. Cash used in investing activities was $800,000, primarily associated with CapEx investment for flow and SaaS business line. With our anticipated revenue growth, we expect to be cash flow positive in fiscal year 2022. We ended our year in a strong cash position with the ability to continue to invest in both our target discovery and our Lumine SaaS platforms outlined by Ronnie.
In summation, looking back at our fiscal year 2021 results, we reached another annual revenue record as we exceeded $41 million and grew our top line by 28%. For the full year, we achieved profitability, and we are positioned to capitalize on the exciting opportunities that lie ahead. For fiscal year 2022, we're projecting revenue growth between 10% and 20%. As we're nearing the end of our first quarter 2022, we'll provide another update in about six weeks when we report our first quarter results. We will now open the call to questions.
Operator
Thank you. At this time we will be conducting a question-and-answer session. (Operator Instructions) Matt Hewitt, Craig-Hallum.
Matt Hewitt - Analyst
Good morning, gentlemen. Thanks for taking the questions. Maybe the first one, David, on the guidance, 10% to 20% in fiscal '22. You just put up 28% growth. I think you've got a pretty nice track record of nearing 20% growth. Is that just some conservative, the reason for bringing in the low end there? What would cause growth to, I guess, dip below even the midpoint of the range?
David Miller - CFO
I think it's a combination of two factors. Number one, yes, we generally want -- certainly want to be more conservative. It's still very early in the year, so we don't have the full picture in terms of what's going to occur in the second half of 2022. We're certainly going to strive to meet our historical revenue growth percentages. And the second is simply as we continue to grow, hitting those same percentages become a little bit more difficult.
Certainly, there's opportunity for us to match our historical revenue growth with growth from our existing service businesses and obviously the new opportunities that we're looking forward. So it's obviously being a little bit conservative, but definitely reasonable. And I think if we do 20%, that's also a very nice year as well.
Matt Hewitt - Analyst
Got it. Okay. Thank you for that. And then I have just a handful of items. But I'm going to kind of go through them here. So first one, on the base business, the flow pipeline. So you started booking some deals last year. Have you actually started to record revenues on those? And what is that pipeline looking like? How will those hit, starting in fiscal '22 the revenue piece of it?
David Miller - CFO
Yeah. So we started recording -- we certainly started recording some revenue. It's contributing. It's not a very significant factor to our overall revenue. It will become a little bit more in 2022. It's not going to make or break the year. And in terms of the overall pipeline, I don't know. Ronnie, if you want to take it. I can start. Certainly, I think the message has been pretty consistent with our flow revenue business. It certainly took a little while for it to get started, took a little bit longer. We certainly have seen an uptick. It is contributing to our revenue and the pipeline is growing. But it is still a little bit behind in terms of our expectations to where we thought we would be at this point.
Matt Hewitt - Analyst
Got it. Okay. And then regarding -- moving on to Lumin here. So I think you provided the update, 75 unique license holders. How have those discussions ramp over the course of the year? What kind of feedback you're getting from customers?
I think you're probably, right now, just starting to have the renewal discussions. How are those proceeding? Anything along those lines? Thank you.
Ronnie Morris - President & CEO
Yeah. So we haven't had the renewal discussions yet. We're just starting to have those right now. So we don't really have any data on that. But that's clearly something we're looking at very carefully. And we're trying to understand user base even from the early days. What do they like about it? What other of the functionality would they like to see?
So as I think we've said previously in the past, it's still early days. We're still learning a lot about the customer base, about who's using it, why are they using it. We're excited by the number of users, the number of people looking at the platform. We've also made a lot of upgrades, and we continue to make upgrades to the platform. So still early days, optimistic, but we're cautiously optimistic as we continue to understand why people are using it, how they like it, and what improvements we can make to make them either use it more or have more users on the system.
Matt Hewitt - Analyst
Got it. And then maybe last question for me and then I'll hop back in the queue. I think you previously had announced a partnership with BGI Americas. Any update on how that's proceeding? That'll do it. Thank you.
Ronnie Morris - President & CEO
Yes, we the partnership just started. So we really don't have much to report on that. I think the important thing about that partnership is that there are many of the companies like BGI that produce a lot of data. But don't really have a home for that data and don't have a place that they can easily transmit that data to the clients who requested data in order to analyze it and look at the data. So we see that as the first of many of our users to be able to use outside vendors. Put the data into our system so that they can easily digest the data, analyze it, and understand the data.
Matt Hewitt - Analyst
Understood. Thank you.
Ronnie Morris - President & CEO
Thank you, Matt.
Operator
(Operator Instructions) Christopher Hillary, Roubaix Capital.
Christopher Hillary - Analyst
Hi, good morning.
Ronnie Morris - President & CEO
Morning.
David Miller - CFO
Morning.
Christopher Hillary - Analyst
Could you give us a use case that you're comfortable sharing on Lumin and how you see those use cases developing as your product offering continues to grow and mature?
Ronnie Morris - President & CEO
So I'm not exactly sure of your question, but I can give you a couple of specifics about kind of who our users are. And so we have a couple of different types of users currently at this time. We have the bioinformaticians who use it more deeply who actually want to go in and try to analyze and develop and understand on more of a deep level some of the biomarker hypothesis. And then we have the principal investigators or the biologists that are just looking for the causality or the relationship between different characteristics within a tumor or within oncology.
So those are those are kind of our users right now. We have user base that includes both institutions who have taken some seats as well as solo private investigators within a pharma or biotech company. And that's kind of our user base. So in terms of that, that's probably the best way I can answer that question.
Christopher Hillary - Analyst
Okay, thank you. And then maybe one more, if you wouldn't mind. Could you remind us how your database, how you formed the database? I think it has to do with the primary and secondary ownership of the data rights just as a way for us to continue to appreciate the breadth and depth of your data that these users are accessing.
Ronnie Morris - President & CEO
So the data within our data within our database is little bit different than the data within Lumin. Lumin is a combination of both our data from our database as well as many, many public data sets that we have aggregated. In terms of our data that we bring to the table and our datasets, those are derived primarily from our tumor banks, which are derived from the patients where we have a lot of clinical information. And we also have information on treatments that were performed on the tumors within our tumor bank as well as the characterization around those tumors. So it will be the RNA and the DNA sequencing, proteomics, and a whole bunch of other levels of characterization.
Christopher Hillary - Analyst
Great. Thank you for your time today.
Ronnie Morris - President & CEO
You're welcome.
Operator
Matt Hewitt, Craig-Hallum.
Matt Hewitt - Analyst
Oh yeah, thank you for taking the follow-up. Just on the exciting news regarding the internal development plan. Maybe if you could go in a little bit as far as -- I think you mentioned six targets that you've already identified. How many teams or people do you have working on these plans? How far through that process do you, I guess, envision taking this? Is it something that in some cases maybe you take it all the way through to commercialization or in others, are you looking to license this once you've proven a valid target? Just a little bit more color there would be helpful. Thanks.
Ronnie Morris - President & CEO
Yeah. Sure, Matt. So yeah, we're very excited about this initiative. We've talked about and thought about it for a long time. We have a couple of teams, probably right now about 10 internal people. Some consultants on the outside who are helping us working to identify the targets and then going back to our labs and to validate those targets, which is a huge advantage from our perspective to be able to take many, many, many targets which we have and go back and actually validate them. Because that's the key stuff here.
So the range of the possibilities, once we have a target, are multiple, as I mentioned. Some, we see a path where we're going to try to do some of the some of the optimization of a compound ourselves and try to go a little further down the path. Some, we think that it makes more sense for us to partner with another entity and co-jointly move that target through the drug development pathway. And some, we think it's just right for outlicensing these targets coming out of our platform. So I think it's a combination approach.
A lot of it has to do with the type of target or the type of molecule we're looking for. Some I think we feel more comfortable doing ourselves. A lot of it has to do the economics. So there's a lot of variables. Again, as I said before, some of our other initiatives is kind of early stages or early days. I think you can expect to hear some announcements over the next couple of months, maybe next quarter or two, of some of these targets and how we're dealing with them. But we're excited. And it's kind of early days. And we're just exploring and mining our data and finding some really interesting stuff out there.
Matt Hewitt - Analyst
That's great. We look forward to tracking the process. Thank you.
Ronnie Morris - President & CEO
You're welcome.
Operator
[Clay Hoffman], private investor.
Clay Hoffman - Private Investor
Yeah, thank you, guys. For first quarter, do you have any guidance on revenue yet?
David Miller - CFO
I mean, I think we'll stick with our overall guidance for the year, which is the 10% to 20%. We haven't generally not provided specific quarterly guidance.
Clay Hoffman - Private Investor
Okay. One follow-up on the targets. Would any of them be considered orphan-status drugs?
Ronnie Morris - President & CEO
No, no. These will not be considered orphan-status drugs. No.
Clay Hoffman - Private Investor
Okay. Thank you.
Ronnie Morris - President & CEO
You're welcome.
Operator
Thank you. Ladies and gentlemen, we have reached the end of the question-and-answer session. I will now turn the call over to Dr. Ronnie Morris for closing remarks.
Ronnie Morris - President & CEO
Thank you. I just want to thank everybody for joining our call. We have some really exciting initiatives as we continue to grow our core businesses. We look forward to the new initiatives, including the SaaS platform as well as our target discovery platform. And we look forward to continuing over the next couple of quarters, giving updates to everybody as we get the news. So thank you for joining, and we'll speak to everybody in six weeks. Bye.
Operator
This concludes today's conference. And you may disconnect your lines at this time. Thank you for your participation and have a wonderful day.