Biggest changeThis data will be used to support our Biologics License Application ("BLA") submission. • We anticipate submitting our BLA for Avance Nerve Graft by the end of 2023. • We expect that the renovation and validation of our Axogen Processing Center facility ("APC Facility") will be complete in mid-2023 and anticipate transition to the new facility in mid-2023 This facility will be included in our BLA for Avance Nerve Graft and is expected to provide processing capacity that will meet our expected sales growth. 58 Table of Content Results of Operations Comparison of the Years Ended December 31, 2022 and 2021 The following table sets forth, for the periods indicated, our results of operations expressed as dollar amounts and as percentages of total revenue: Year Ended December 31, 2022 2021 % of % of Amount Revenue Amount Revenue (dollars in thousands) Revenues $ 138,584 100.0 % $ 127,358 100.0 % Cost of goods sold 24,147 17.4 % 22,931 18.0 % Gross profit 114,437 82.6 % 104,427 82.0 % Costs and expenses: Sales and marketing 80,228 57.9 % 73,328 57.6 % Research and development 27,158 19.6 % 24,177 19.0 % General and administrative 36,758 26.5 % 32,338 25.4 % Total costs and expenses 144,144 104.0 % 129,843 102.0 % Loss from operations (29,707) (21.4) % (25,416) (20.0) % Other (expense) income: Investment income 569 0.4 % 93 0.1 % Interest expense (624) (0.5) % (1,356) (1.1) % Change in fair value of derivatives 1,044 0.8 % (28) — % Other expense (230) (0.2) % (278) (0.2) % Total other (expense) income, net 759 0.5 % (1,569) (1.2) % Net loss $ (28,948) (20.9) % $ (26,985) (21.2) % The following table sets forth, for the periods indicated, our revenues excluding the impact of Avive: Year Ended December 31, 2022 2021 (dollars in thousands) Revenues $ 138,584 $ 127,358 Revenues from Avive — (4,075) Revenues excluding Avive $ 138,584 $ 123,283 Revenue s Revenues for the year ended December 31, 2022, increased, $11,226 or 8.8%, to $138,584 as compared to $127,358 for the year ended December 31, 2021.
Biggest changeResults of Operations Comparison of the Years Ended December 31, 2023, and 2022 The following table sets forth, for the periods indicated, our results of operations expressed as dollar amounts and as percentages of total revenue: Year Ended December 31, 2023 2022 % of % of Amount Revenue Amount Revenue (dollars in thousands) Revenues $ 159,012 100.0 % $ 138,584 100.0 % Cost of goods sold 31,138 19.6 % 24,147 17.4 % Gross profit 127,874 80.4 % 114,437 82.6 % Costs and expenses: Sales and marketing 86,060 54.1 % 80,228 57.9 % Research and development 28,333 17.8 % 27,158 19.6 % General and administrative 34,943 22.0 % 36,758 26.5 % Total costs and expenses 149,336 93.9 % 144,144 104.0 % Loss from operations (21,462) (13.5) % (29,707) (21.4) % Other (expense) income: Investment income 1,487 0.9 % 569 0.4 % Interest expense (2,835) (1.8) % (624) (0.5) % Change in fair value of derivatives 1,531 1.0 % 1,044 0.8 % Other expense (437) (0.3) % (230) (0.2) % Total other (expense) income, net (254) (0.2) % 759 0.5 % Net loss $ (21,716) (13.7) % $ (28,948) (20.9) % Revenue s Revenues for the year ended December 31, 2023, increased, $20,428 or 14.7%, to $159,012 as compared to $138,584 for the year ended December 31, 2022.
The number of PSU's that will ultimately be earned is based upon our performance as measured against specified targets over the measurement period. Expectations related to the achievement of performance goals associated with PSU grants is assessed as of each reporting period and is used to determine whether PSU grants are expected to vest.
The number of PSU's that will ultimately be earned is based upon our performance as measured against specified targets over the measurement period. Expectations related to the achievement of performance goals associated with PSU grants is assessed at each reporting period and is used to determine whether PSU grants are expected to vest.
Derivative Instruments We review debt instruments to determine whether there are embedded derivative instruments, which are required to be bifurcated and accounted for separately as a derivative financial instrument.
Derivative Instruments Description We review debt instruments to determine whether there are embedded derivative instruments, which are required to be bifurcated and accounted for separately as a derivative financial instrument.
These active accounts have typically gone through the committee approval process, have at least one surgeon who has converted a portion of his or her treatment algorithms of peripheral nerve repair to our portfolio and have ordered our products at least six times in the last twelve months.
These active accounts have typically gone through the Value Analysis Committee approval process, have at least one surgeon who has converted a portion of his or her treatment algorithms of peripheral nerve repair to our portfolio and have ordered our products at least six times in the last twelve months.
Contractual Obligations and Commitments See Note 8 - Leases and Note 14 - Commitments and Contingencies in the Notes to the Consolidated Financial Statements Part II, Item 8 of this Form 10-K, for further information.
See Note 8 - Leases and Note 14 - Commitments and Contingencies in the Notes to the Consolidated Financial Statements Part II, Item 8 of this Form 10-K, for further information.
Embedded derivatives that are not clearly and 62 Table of Content closely related to the debt host are bifurcated and are recognized at fair value on the consolidated balance sheet with changes in fair value recognized as either a gain or loss on the consolidated statement of operations each reporting period.
Embedded derivatives that are not clearly and closely related to the debt host are bifurcated and are recognized at fair value on the consolidated balance sheet with changes in fair value recognized as either a gain or loss on the consolidated statement of operations each reporting period.
Our portfolio of products is currently available in the U.S., Canada, Germany, United Kingdom ("UK"), Spain and several other European, Asian and Latin American countries.
Our portfolio of products is currently available in the United States "(U.S."), Canada, Germany, United Kingdom, Spain and several other European, Asian and Latin American countries.
Revenue from the distribution of our nerve repair products, Avance ® Nerve Graft, Axoguard Nerve Connector ® , Axoguard Nerve Protector ® , and Axoguard Nerve Cap ® , in the United States ("U.S.") is the main contributor to our total reported sales and have been the key component of our growth to date.
Revenue from the distribution of our nerve repair products, Avance ® Nerve Graft, Axoguard Nerve Connector ® , Axoguard Nerve Protector ® , Axoguard HA+ Nerve Protector™, and Axoguard Nerve Cap ® , in the U.S. is the main contributor to our total reported sales and have been the key component of our growth to date.
If performance-based milestones related to PSU grants are not met or not expected to be met, any compensation expense recognized associated with such grants will be reversed. We recognize compensation expense related to the Employee Stock Purchase Plan (“ESPP”) based on the estimated fair value of the options on the date of grant.
If performance-based milestones related to PSU grants are not met or not expected to be met, any compensation expense recognized associated with such grants will be reversed. P71 Table of Conten t We recognize compensation expense related to the Employee Stock Purchase Plan (“ESPP”) based on the estimated fair value of the options on the date of grant.
The increasing need for capital could also make it more difficult to obtain funding through either equity or debt. Should additional capital not become available to us as needed, 61 Table of Content we may be required to take certain actions, such as slowing sales and marketing expansion, delaying regulatory approvals, or reducing headcount.
The increasing need for capital could also make it more difficult to obtain funding through either equity or debt. Should additional capital not become available to us as needed, P69 Table of Conten t we may be required to take certain actions, such as slowing sales and marketing expansion, delaying regulatory approvals, or reducing headcount.
Sources of Capital Our expected future capital requirements may depend on many factors including expanding our customer base and sales force and timing and extent of spending in obtaining regulatory approval and introduction of new products.
Liquidity and Capital Resources Our expected future capital requirements may depend on many factors including expanding our customer base and sales force and timing and extent of spending in obtaining regulatory approval and introduction of new products.
Actual results could differ from our estimates and assumptions, and any such differences could be material to our results of operations and financial condition. Inventories Inventories, consisting of purchased materials, direct labor and manufacturing overhead, are stated at the lower of cost or net realizable value, as determined by the first-in, first-out method.
Actual results could differ from our estimates and assumptions, and any such differences could be material to our results of operations and financial condition. P70 Table of Conten t Inventories Description Inventories consist of purchased materials, direct labor and manufacturing overhead, are stated at the lower of cost or net realizable value, as determined by the first-in, first-out method.
A discussion of net cash provided by investing activities during the year ended December 31, 2020 can be found in Item 7 of our Annual Report on Form 10-K for the fiscal year ended December 31, 2021, filed on February 25, 2022.
A discussion of net cash provided by investing activities during the year ended December 31, 2021, can be found in Item 7 of our Annual Report on Form 10-K for the fiscal year ended December 31, 2022, filed on March 14, 2023.
A discussion of net cash provided by financing activities during the year ended December 31, 2020 can be found in Item 7 of our Annual Report on Form 10-K for the fiscal year ended December 31, 2021, filed on February 25, 2022.
A discussion of net cash provided by financing activities during the year ended December 31, 2021, can be found in Item 7 of our Annual Report on Form 10-K for the fiscal year ended December 31, 2022, filed on March 14, 2023.
A discussion of net cash used in operating activities during the year ended December 31, 2020 can be found in Item 7 of our Annual Report on Form 10-K for the fiscal year ended December 31, 2021, filed on February 25, 2022.
A discussion of net cash used in operating activities during the year ended December 31, 2021, can be found in Item 7 of our Annual Report on Form 10-K for the fiscal year ended December 31, 2022, filed on March 14, 2023.
As previously announced, we suspended the market availability of Avive ® Soft Tissue Membrane ("Avive") on June 1, 2021 and we continue discussions with the U.S. Food and Drug Administration ("FDA") to determine the appropriate regulatory classification and requirements for Avive. The suspension was not based on any known or reported safety or product performance issues or concerns with Avive.
As previously announced, we suspended the market availability of Avive ® Soft Tissue Membrane ("Avive") on June 1, 2021, to have discussions with the U.S. Food and Drug Administration ("FDA") about the appropriate regulatory classification and requirements for Avive. The reported safety or product performance issues or concerns with Avive.
Revenue growth, excluding the impact of Avive in 2021, was driven by an increase in unit volume of approximately 7.3%, as well as the net impact of changes in price and product mix of approximately 3.7%. and 1.7%, respectively. The unit volume increase was attributed to growth in our core and active accounts.
Revenue growth was driven by an increase in unit volume of approximately 8.6%, as well as the net impact of changes in price and product mix of approximately 3.7% and 2.5%, respectively. The unit volume increase was attributed to growth in our core and active accounts.
In connection with the Credit Facility, we recognized total interest charges of $6,721 and $5,503 for the year ended December 31, 2022, and 2021, respectively, and of this interest we capitalized to the construction of the APC Facility, interest charges of $6,155 and $4,277 for the year ended December 31, 2022, and 2021, respectively.
In connection with the Credit Facility, we recognized total interest charges of $8,083 and $6,721 for the years ended December 31, 2023, and 2022, respectively, and of this interest we capitalized to the construction of the APC Facility, interest charges of $5,285 and $6,155 for the years ended December 31, 2023, and 2022, respectively.
Cash Flow Information The following table presents a summary of our cash flows from operating, investing and financing activities: Year Ended December 31, (in thousands) 2022 2021 Net cash (used in) provided by: Operating activities $ (16,066) $ (13,405) Investing activities (3,200) (23,649) Financing activities 1,794 20,452 Net (decrease) increase in cash and cash equivalent $ (17,472) $ (16,602) Net Cash Used in Operating Activities Net cash used in operating activities was $16,066 and $13,405 during the years ended December 31, 2022 and 2021, respectively.
Cash Flow Information The following table presents a summary of our cash flows from operating, investing and financing activities: Year Ended December 31, (in thousands) 2023 2022 Net cash (used in) provided by: Operating activities $ (5,716) $ (16,066) Investing activities 19,253 (3,200) Financing activities 1,954 1,794 Net increase (decrease) in cash and cash equivalent $ 15,491 $ (17,472) Net Cash Used in Operating Activities Net cash used in operating activities was $5,716 and $16,066 during the years ended December 31, 2023, and 2022, respectively.
We provide innovative, clinically proven, and economically effective repair solutions for surgeons and healthcare providers. Peripheral nerves provide the pathways for both motor and sensory signals throughout the body. Every day, people suffer traumatic injuries or undergo surgical procedures that impact the function of their peripheral nerves.
Peripheral nerves provide the pathways for both motor and sensory signals throughout the body. Every day, people suffer traumatic injuries or undergo surgical procedures that impact the function of their peripheral nerves.
The change in net cash used in investing activities was due to the decrease in the net purchase and sale of investments totaling $14,252 and capital expenditures, primarily related to the renovation of the APC Facility, of $7,733.
The change in net cash used in investing activities was due to the increase in the net purchase and proceeds of the sale of investments totaling $16,118 and net decrease in the capital expenditures, primarily related to the renovation of the APC Facility, of $6,206.
Revenue participation payments are calculated as a percentage of our net revenues, up to $70,000 in any given year, adding approximately 1.0% per year of additional interest payments on the outstanding indebtedness.
Interest is calculated as 7.5% plus the greater of the Adjusted SOFR or 2.0% (12.99% as of December 31, 2023). Revenue participation payments are calculated as a percentage of our net revenues, up to $70,000 in any given year, adding approximately 1.5% per year of additional interest payments on the outstanding indebtedness.
Research and development expenses increased $2,981, or 12.3%, to $27,158 for the year ended December 31, 2022 as compared to $24,177 for the year ended December 31, 2021. The increase was primarily due to product development and clinical expenses.
Research and development expenses increased $1,175, or 4.3%, to $28,333 for the year ended December 31, 2023, as compared to $27,158 for the year ended December 31, 2022. The increase was primarily due to product development and clinical expenses.
In addition, we measure stock options granted to employees at a premium price based on market conditions, such as the trading price of our common stock, using a Monte Carlo Simulation option-pricing model in estimating the fair value at the grant date. The fair value of the PSU grants is based on our closing stock price on the grant date.
In addition, we measure stock options granted to employees at a premium price based on market conditions, such as the trading price of our common stock, using a Monte Carlo Simulation option-pricing model in estimating the fair value at the grant date. Key assumptions in determining fair value include volatility, risk-free interest rate, dividend yield and expected term.
The fair value of embedded derivatives are measured based on equity markets and interest rates, as well as an estimate of our nonperformance risk adjustment. This estimate includes an option adjusted spread and an estimate of our risk-free rate.
Judgements and Uncertainties The fair value of embedded derivatives are measured based on equity markets and interest rates, as well as an estimate of our nonperformance risk adjustment. This estimate includes an option adjusted spread and an estimate of our discount rate. Sensitivity of Estimate to Change As of December 31, 2023, we recorded a derivative liability of $2,987.
Net Cash Provided by Financing Activities Net cash provided by financing activities was $1,794 as compared to $20,452 for the years ended December 31, 2022, and 2021, respectively, a decrease of $18,658 or 91%.
Net Cash Provided by Financing Activities Net cash provided by financing activities was $1,954 as compared to $1,794 for the years ended December 31, 2023, and 2022, respectively, an increase of $161 or 9%.
Dollar amounts referenced in this Item 7 are in thousands, except per share amounts. Overview We are the leading company focused specifically on the science, development, and commercialization of technologies for peripheral nerve regeneration and repair. We are passionate about providing the opportunity to restore nerve function and quality of life for patients with peripheral nerve injuries.
Overview We are the leading company focused specifically on the science, development, and commercialization of technologies for peripheral nerve regeneration and repair. We are passionate about providing the opportunity to restore nerve function and quality of life for patients with peripheral nerve injuries. We provide innovative, clinically proven, and economically effective repair solutions for surgeons and healthcare providers.
Product Portfolio • Avance ® Nerve Graft, a biologically active off-the-shelf processed human nerve allograft for bridging severed peripheral nerves without the comorbidities associated with a second surgical site; • Axoguard Nerve Connector ® , a porcine (pig) submucosa extracellular matrix ("ECM") coaptation aid for tensionless repair of severed peripheral nerves; • Axoguard Nerve Protector ® , a porcine submucosa ECM product used to wrap and protect damaged peripheral nerves and reinforce the nerve reconstruction while preventing soft tissue attachments; • Axoguard Nerve Cap ® , a porcine submucosa ECM product used to protect a peripheral nerve end and separate the nerve from the surrounding environment to reduce the development of symptomatic or painful neuroma; • Axotouch ® Two-Point Discriminator, used to measure the innervation density of any surface area of the skin.
Product Portfolio • Avance ® Nerve Graft, a biologically active off-the-shelf processed human nerve allograft for bridging severed peripheral nerves without the comorbidities associated with a second surgical site; • Axoguard Nerve Connector ® , a porcine (pig) submucosa extracellular matrix ("ECM") coaptation aid for tensionless repair of severed peripheral nerves; • Axoguard Nerve Protector ® , a porcine submucosa ECM product used to wrap and protect damaged peripheral nerves and reinforce the nerve reconstruction while preventing soft tissue attachments; • Axoguard HA+ Nerve Protector™, is comprised of a processed porcine submucosa ECM base layer with a hyaluronate-alginate gel coating designed to provide short- and long-term protection for peripheral nerve injuries.
Other Income and Expense Total other income increased $2,328, or 148.3% to income of $759 for the year ended December 31, 2022, as compared to an expense of $1,569 for the year ended December 31, 2021.
Other Income and Expense Total other (expense) income decreased $1,013, or 133.5% to expense of $254 for the year ended December 31, 2023, as compared to income of $759 for the year ended December 31, 2022.
Sales and marketing expenses increased $6,900, or 9.4%, to $80,228 for the year ended December 31, 2022 as compared to $73,328 for the year ended December 31, 2021.
Sales and marketing expenses increased $5,833, or 7.3%, to $86,060 for the year ended December 31, 2023, as compared to $80,228 for the year ended December 31, 2022.
Net Cash Used in Investing Activities Net cash used in investing activities was $3,200 as compared to $23,649 of for the years ended December 31, 2022 and 2021, respectively, a decrease $20,449 or 86%.
Net Cash Provided by Investing Activities Net cash provided by investing activities was $19,253 as compared to cash used in investing activities of $3,200 for the years ended December 31, 2023, and 2022, respectively, an increase of $22,453 or 702%.
The change was primarily due to the decrease in the fair value of the derivative liability of $1,072, the increase in investment income of $476 and decrease in interest expense of $732.
The change was primarily due to the increase in interest expense of $2,211 and other expenses of $208, partially offset by the increase in investment income of $918 and the fair value of the derivative liability of $488.
Income Taxes We had no income tax expense or benefit for the years ended December 31, 2022, and 2021, due to the incurrence of net operating losses in both years, the benefits of which have been fully reserved. We do not believe that there are any additional tax expenses or benefits currently available.
The increase in investment income was primarily related to the Federal Reserve raising interest rates 100 basis points throughout 2023. Income Taxes We had no federal income tax expense or benefit for the years ended December 31, 2023, and 2022, due to the incurrence of net operating losses in both years, the benefits of which have been fully reserved.
As of December 31, 2022, we had 968 active accounts, an increase of 2.9% from 941 one year ago. Active accounts are approximately 85% of our revenue. The top 10% of these active accounts continue to represent approximately 35% of our revenue.
As of December 31, 2023, we had 1,006 active accounts, an increase of 3.9% from 968 one year ago. Active accounts are approximately 87% of our revenue. The top 10% of these active accounts continue to represent approximately 40% of our revenue. Core accounts are defined as accounts that have purchased at least $100 in the past twelve months.
As of 59 Table of Content December 31, 2022, we had 968 active accounts, an increase of 2.9% from 941 from the prior year and 332 core accounts, an increase of 17.7% from 282 at December 31, 2021, excluding the impact of revenues from Avive.
As of December 31, 2023, we had 1,006 active accounts, an increase of 3.9% from 968 from the prior year and 376 core accounts, an increase of 13.3% from 332 at December 31, 2022.
The unfavorable change in net cash used in operating activities of $2,661 or 19.9% was due to the following: (i) the net unfavorable change of $3,282 in working capital accounts and (ii) the increase in net loss of $1,963.
The favorable change in net cash used in operating activities of $10,350 or 64.4% was due to the following: (i) the net favorable change of $5,172 in working capital accounts and (ii) the decrease in net loss of $7,232.
Product development costs include spending for a number of specific programs including the non-clinical expenses related to the BLA for Avance Nerve Graft, a next generation Avance product, as well as product and application innovations across our nerve repair portfolio.
Product development costs include spending for a number of specific programs including the non-clinical expenses related to the BLA for Avance Nerve Graft. Product development expenses represented approximately 60% and 52% of total research and development expense for the years ended December 31, 2023, and 2022, respectively.
Surgeons typically start with a few cases and then wait and see the results of these initial cases. Active accounts are usually past this wait period and have developed some level of product reorder.
Active accounts are usually past this wait period and P65 Table of Conten t have developed some level of product reorder.
Share-Based Compensation Share-based compensation is in the form of stock options, restricted stock units ("RSU"), performance stock units ("PSU"), and recognized at, or above, the fair market value of our common stock on the date of grant. We estimate the fair value of each stock option award on the date of grant using a multiple-point Black-Scholes option-pricing model.
The estimated fair value of the options related to the Employee Stock Purchase Plan are based on the Black-Scholes option pricing model. Judgments and Uncertainties We estimate the grant date fair value of each stock option award on the date of grant using a multiple-point Black-Scholes option-pricing model.
The change in net cash provided by financing activities was primarily due to no additional proceeds from draws on the Credit Facility during 2022 compared to a $15,000 drawdown of the Credit Facility in the second quarter of in 2021, and a decrease of $3,661 in proceeds from the exercise of stock options year-over-year.
The change in net cash provided by financing activities was primarily due to an increase of $159 in proceeds from the exercise of stock options and ESPP purchases year-over-year.
Liquidity and Capital Resources As of December 31, 2022, our principal sources of liquidity were our cash and cash equivalents and investments totaling $48,789. Our cash equivalents are comprised of a money market mutual fund and our investments are comprised of short-term commercial paper and U.S. Treasuries.
Our cash equivalents are comprised of a money market mutual fund and during the year ended December 31, 2022, we had investments comprised of short-term commercial paper and U.S. Treasuries. Our cash and cash equivalents and investments decreased $17,766 from $48,790 at December 31, 2022, primarily as a result of the renovations of our APC Facility, and general operating activities.
See Note 8 - Leases in the Notes to the Consolidated Financial Statements Part II, Item 8 of this Form 10-K. Credit Facilities As of December 31, 2022, we had $50,000 outstanding in indebtedness under a credit facility; $35,000 maturing on June 30, 2027 and $15,000 maturing on June 30, 2028.
Credit Facilities As of December 31, 2023, we had $50,000 outstanding in indebtedness under a credit facility; $35,000 maturing on June 30, 2027, and 15,000 maturing on June 30, 2028. Quarterly interest only and revenue participation payments are due through each of the maturity dates.
Gross Profit Gross profit for the year ended December 31, 2022, increased $10,010 or 9.6% to $114,437 as compared to $104,427 for the year ended December 31, 2021. Gross margin as a percentage of revenue increased to 82.6% for the year ended December 31, 2022. as compared to 82.0% for the year ended December 31, 2021.
Gross margin as a percentage of revenue decreased to 80.4% for the year ended December 31, 2023, as compared to 82.6% for the year ended December 31, 2022. Costs and Expenses Total costs and expenses increased, $5,192 or 3.6%, to $149,336 for the year ended December 31, 2023, as compared to $144,144 for the year ended December 31, 2022.
Clinical trial expenses represented approximately 48% and 46% of total research and development expense for the years ended December 31, 2022, and 2021. General and administrative expenses increased $4,420, or 13.7%, to 36,758 for the year ended December 31, 2022 as compared to $32,338 for the year ended December 31, 2021.
General and administrative expenses decreased $1,816, or 4.9%, to $34,943 for the year ended December 31, 2023, as compared to $36,758 for the year ended December 31, 2022.
We refer to these as core accounts which we define as accounts that have purchased at least $100 in the past 12 months. As of December 31, 2022, we had 332 core accounts, an increase of 17.7% from 282 one year ago.
As of December 31, 2023, we had 376 core accounts, an increase of 13.3% from 332 one year ago. These core accounts represented approximately 65% our revenue in 2023, which increased approximately 60% ov er the past two years.
We seek to return Avive to the market, although we are unable to estimate the timeframe or provide any assurances that a return to the market will be achievable. We have experienced that surgeons initially are cautious adopters for peripheral nerve repair products.
We seek to launch Avive+ in the second quarter of 2024. We have observed that surgeons initially are cautious adopters for peripheral nerve repair products. Surgeons typically start with a few cases and then wait and review the results of these initial cases.
It is expected that costs associated with the BLA will continue to increase as we continue to invest in completing the license application. Product development expenses represented approximately 52% and 53% of total research and development expense for the years ended December 31, 2022, and 2021, respectively.
Clinical trial expenses represented approximately 40% and 48% of total research and development expense for the years ended December 31, 2023, and 2022, respectively. The increase in research and development included increases in compensation costs of $1,635; $331 in professional fees; $287 in occupancy costs; and $98 in travel costs to support these clinical and non-clinical expenses.