Biggest changeWe maintain a full valuation allowance for deferred tax assets including NOL carryforwards, R&D credits and other tax credits. 76 Table of Contents Results of operations Consolidated results of operations for the year ended December 31, 2023, compared to the year ended December 31, 2022 Year ended December 31, Change (in thousands) 2023 2022 $ % Revenue $ 39,295 $ 22,469 $ 16,826 75 % Cost of goods sold 6,256 4,999 1,257 25 % Gross profit 33,039 17,470 15,569 89 % Gross margin 84 % 78 % Operating Expenses: Research and development 11,633 9,952 1,681 17 % Selling, general and administrative 64,509 50,045 14,464 29 % Total operating expenses 76,142 59,997 16,145 27 % Loss from operations (43,103) (42,527) (576) 1 % Interest expense (1,799) (165) (1,634) NM Other income, net 3,850 1,373 2,477 180 % Loss before income taxes (41,052) (41,319) 267 (1) % Provision for income taxes (147) (109) (38) 35 % Net loss $ (41,199) $ (41,428) $ 229 (1) % NM – Not meaningful Revenue Revenue by Geography Year ended December 31, Change (in thousands) 2023 2022 $ % United States $ 35,111 $ 18,021 $ 17,090 95 % Europe 4,184 4,448 (264) (6) % Total Revenue $ 39,295 $ 22,469 $ 16,826 75 % Revenue was $39.3 million for the year ended December 31, 2023, an increase of $16.8 million, or 75%, over the year ended December 31, 2022.
Biggest changeResults of operations Consolidated results of operations for the year ended December 31, 2024, compared to the year ended December 31, 2023 Year ended December 31, Change (in thousands) 2024 2023 $ % Revenue $ 51,292 $ 39,295 $ 11,997 31 % Cost of goods sold 8,334 6,256 2,078 33 % Gross profit 42,958 33,039 9,919 30 % Gross margin 84 % 84 % Operating Expenses: Research and development 11,131 11,633 (502) (4) % Selling, general and administrative 91,317 64,509 26,808 42 % Total operating expenses 102,448 76,142 26,306 35 % Loss from operations (59,490) (43,103) (16,387) 38 % Interest expense (4,397) (1,799) (2,598) 144 % Other income, net 3,977 3,850 127 3 % Loss before income taxes (59,910) (41,052) (18,858) 46 % Provision for income taxes (55) (147) 92 (63) % Net loss $ (59,965) $ (41,199) $ (18,766) 46 % 76 Table of Contents Revenue Revenue by Geography Year ended December 31, Change (in thousands) 2024 2023 $ % United States $ 47,167 $ 35,111 $ 12,056 34 % Europe 4,125 4,184 (59) (1) % Total Revenue $ 51,292 $ 39,295 $ 11,997 31 % Revenue was $51.3 million for the year ended December 31, 2024, an increase of $12.0 million, or 31%, over the year ended December 31, 2023.
ASC 718 requires all equity-based compensation awards to employees and non-employee directors, including grants of restricted shares and stock options, to be recognized as expense in the statements of operations and comprehensive loss based on their grant date fair values. We estimate the grant date fair value of stock options using the Black-Scholes option pricing model.
ASC 718 requires all equity-based compensation awards to employees and non-employee directors, including grants of restricted shares and stock options, to be recognized as expense in the consolidated statements of operations and comprehensive loss based on their grant date fair values. We estimate the grant date fair value of stock options using the Black-Scholes option pricing model.
We expect to derive future revenue by continuing to both expand our own dedicated salesforce and increase awareness of Barostim among payors, physicians and patients. 73 Table of Contents Our sales and marketing efforts are directed at EPs, HF specialists, interventional and general cardiologists and vascular surgeons because they are the primary users of our technology.
We expect to derive future revenue by continuing to both expand our own dedicated salesforce and increase awareness of Barostim among payers, physicians, and patients. 73 Table of Contents Our sales and marketing efforts are directed at EPs, HF specialists, interventional and general cardiologists, and vascular surgeons because they are the primary users of our technology.
While we expect our gross margin to be positively affected over time to the extent we are successful in selling more product through our direct sales force and by increasing our production volumes, it will likely fluctuate from period to period as we continue to introduce new products and adopt new manufacturing processes and technologies.
While we expect our gross margin to be positively affected over time to the extent we are successful in selling more product through our direct sales force and by increasing our production volumes, it will likely fluctuate from period to period as we continue to introduce new or modified products and adopt new manufacturing processes and technologies.
We expect to continue to drive increases in revenue through our efforts to increase awareness of Barostim among physicians, patients and payors, and by the expansion of our U.S. sales force, as well as by seeking expanded labeling for Barostim. As a result, we expect that U.S. sales will continue to account for the majority of our revenue going forward.
We expect to continue to drive increases in revenue through our efforts to increase awareness of Barostim among physicians, patients and payers, and by the expansion of our U.S. sales force, as well as by seeking expanded labeling for Barostim. As a result, we expect that U.S. sales will continue to account for the majority of our revenue going forward.
In the U.S., we estimate that 67% of our target patient population is Medicare-eligible based on the age demographic of the HFrEF patient population indicated for Barostim. As a result, we have prioritized coverage by the CMS while simultaneously developing processes to engage commercial payors.
In the U.S., we estimate that 67% of our target patient population is Medicare-eligible based on the age demographic of the HFrEF patient population indicated for Barostim. As a result, we have prioritized coverage by the CMS while simultaneously developing processes to engage commercial payers.
We have dedicated significant resources to educate physicians who treat HFrEF about the advantages of Barostim and train them on the implant procedure. The costs for the device and implantation procedure are reimbursed through various third-party payors, such as government agencies and commercial payors.
We have dedicated significant resources to educate physicians who treat HFrEF about the advantages of Barostim and train them on the implant procedure. The costs for the device and implantation procedure are reimbursed through various third-party payers, such as government agencies and commercial payers.
We expect cost of goods sold to increase in absolute dollars primarily as, and to the extent, our revenue grows. Gross margin may also vary based on regional differences in rebates and incentives negotiated with certain customers. 75 Table of Contents We calculate gross margin as revenue less cost of goods sold divided by revenue.
We expect cost of goods sold to increase in absolute dollars primarily as, and to the extent, our revenue grows. Gross margin may also vary based on regional differences in rebates and incentives negotiated with certain customers. We calculate gross margin as revenue less cost of goods sold divided by revenue.
We expense R&D costs as they are incurred. We expect R&D expenses to increase in absolute dollars as we continue to develop enhancements to Barostim. Our R&D expenses may fluctuate from period to period due to the timing and extent of our product development and clinical trial expenses.
We expense R&D costs as they are incurred. We expect R&D expenses to increase in absolute dollars as we continue to develop enhancements to Barostim. Our 75 Table of Contents R&D expenses may fluctuate from period to period due to the timing and extent of our product development and clinical trial expenses.
Stock-based compensation We maintain an equity incentive plan that was adopted in 2001 to provide long-term incentives for employees, consultants and members of the Board of Directors. The plan allows for the issuance of non-statutory and incentive stock options to employees and non-statutory stock options to consultants and non-employee directors.
Stock-based compensation We maintain an equity incentive plan that was adopted in 2001 to provide long-term incentives for employees, consultants, and members of the Board of Directors. The plan allows for the issuance of non-statutory and 80 Table of Contents incentive stock options to employees and non-statutory stock options to consultants and non-employee directors.
Cash provided by financing activities: Net cash provided by financing activities for the year ended December 31, 2023 was $24.0 million and consisted of $22.5 million related to proceeds from debt financing, $0.9 million related to proceeds from the Employee Stock Purchase Plan and $0.7 million related to proceeds from the exercise of common stock options, partially offset by debt financing costs of $0.2 million.
Net cash provided by financing activities for the year ended December 31, 2023 was $24.0 million and consisted of $22.5 million related to proceeds from debt financing, $0.9 million related to proceeds from the ESPP and $0.7 million related to proceeds from the exercise of common stock options, partially offset by debt financing costs of $0.2 million.
A performance covenant takes effect at the earlier of September 30, 2025 or the third tranche funding requiring that we achieve 50% of the trailing twelve months revenue target set in the Board-approved revenue plan in effect for such period. Critical accounting policies and estimates The preparation of consolidated financial statements in conformity with accounting principles generally accepted in the United States of America requires our management to make estimates and judgments that affect the amounts reported in our consolidated financial statements and accompanying notes included elsewhere in this Annual Report on Form 10-K.
A performance covenant took effect upon the third tranche funding, requiring that we achieve 50% of the trailing twelve months revenue target set in the Board-approved revenue plan in effect for such period. Critical accounting policies and estimates The preparation of consolidated financial statements in conformity with accounting principles generally accepted in the United States of America requires our management to make estimates and judgments that affect the amounts reported in our consolidated financial statements and accompanying notes included elsewhere in this Annual Report on Form 10-K.
Barostim provides Baroreflex Activation Therapy by sending imperceptible and persistent electrical pulses to baroreceptors located in the wall of the carotid artery to signal the brain to modulate cardiovascular function.
Barostim provides BAT by sending imperceptible and persistent electrical pulses to baroreceptors located in the wall of the carotid artery to signal the brain to modulate cardiovascular function.
As of December 31, 2023, we had a total of 178 active implanting centers, as compared to 106 as of December 31, 2022. Active implanting centers are customers that have completed at least one commercial HF implant in the last 12 months.
As of December 31, 2024, we had a total of 223 active implanting centers in the U.S., as compared to 178 as of December 31, 2023. Active implanting centers are customers that have completed at least one commercial HF implant in the last 12 months.
We believe that our existing cash resources and Loan Agreement for Term Loans together with revenue will be sufficient to meet our forecasted requirements for operating liquidity, capital expenditures and debt services for at least the next three years.
We believe that our existing cash resources together with cash from operations will be sufficient to meet our forecasted requirements for operating liquidity, capital expenditures and debt services for at least the next three years.
Interest expense Interest expense increased $1.6 million, to $1.8 million for the year ended December 31, 2023, compared to the year ended December 31, 2022. This increase was driven by the interest expense on borrowings under the Loan Agreement entered into on October 31, 2022.
Interest expense Interest expense increased $2.6 million to $4.4 million for the year ended December 31, 2024, compared to the year ended December 31, 2023. This increase was driven by the interest expense on higher levels of borrowings under the Loan Agreement entered into on October 31, 2022.
As of December 31, 2023, no shares have been sold. Our future liquidity and capital funding requirements will depend on numerous factors, including: ● our investment in our U.S. commercial infrastructure and sales forces; ● the degree and rate of market acceptance of Barostim and the ability for our customers to obtain appropriate levels of reimbursement; ● the costs of commercialization activities, including product sales, marketing, manufacturing and distribution; ● our R&D activities for product enhancements and to expand our indications; ● the costs of filing, prosecuting, defending and enforcing any patent claims and other intellectual property rights; ● our need to implement additional infrastructure and internal systems; ● our ability to hire additional personnel to support our operations as a public company; and ● the emergence of competing technologies or other adverse market developments.
We have remaining capacity to issue and sell up to $16.2 million of additional shares of common stock under this ATM offering. Our future liquidity and capital funding requirements will depend on numerous factors, including: ● our investment in our U.S. commercial infrastructure and sales forces; ● the degree and rate of market acceptance of Barostim and the ability for our customers to obtain appropriate levels of reimbursement; ● the costs of commercialization activities, including product sales, marketing, manufacturing, and distribution; ● our R&D activities for product enhancements and to expand our indications; 78 Table of Contents ● the costs of filing, prosecuting, defending, and enforcing any patent claims and other intellectual property rights; ● our need to implement additional infrastructure and internal systems; ● our ability to hire additional personnel to support our operations as a public company; and ● the emergence of competing technologies or other adverse market developments.
The increase was primarily driven by continued growth as a result of the expansion into new sales territories and new accounts, as well as increased physician and patient awareness of Barostim. Total HF revenue units in the U.S. totaled 1,123 and 587 for the years ended December 31, 2023 and 2022, respectively.
HF revenue in the U.S. totaled $46.8 million and $34.6 million for the years ended December 31, 2024 and 2023, respectively. The increase was primarily driven by continued growth as a result of the expansion into new sales territories and new accounts, as well as increased physician and patient awareness of Barostim.
Net cash used in operating activities for the year ended December 31, 2022 was $42.7 million and consisted primarily of a net loss of $41.4 million and a decrease in net operating assets of $5.6 million, partially offset by $3.9 million from non-cash stock-based compensation expense and $0.4 million from the depreciation of property and equipment.
Net cash used in operating activities for the year ended December 31, 2023 was $39.0 million and consisted primarily of a net loss of $41.2 million and a decrease in net operating assets of $4.8 million, partially offset by $6.3 million from non-cash stock-based compensation expense, $0.5 million from the depreciation of property and equipment and $0.2 million from amortization of deferred financing costs and loan discount.
These factors include: ● Growing and supporting our U.S. commercial organization; ● Seeking expanded labeling for Barostim and promoting awareness among physicians, hospitals and patients to accelerate adoption of Barostim; ● Raising awareness among payors to build upon reimbursement for Barostim; ● Investing in research and development to foster innovation and further simplify the Barostim procedure; and ● Leveraging our manufacturing capacity to further improve our gross margins.
These factors include: ● Growing and supporting our U.S. commercial organization; ● Promoting awareness among physicians, hospitals, and patients to accelerate adoption of Barostim; ● Continuing to develop and disseminate clinical evidence supporting the benefits of Barostim; 74 Table of Contents ● Raising awareness among payers to build upon reimbursement for Barostim; ● Investing in research and development to foster innovation; and ● Leveraging our manufacturing capacity to further improve our gross margins.
Net cash provided by financing activities for the year ended December 31, 2022 was $7.5 million and consisted of $7.5 million related to proceeds from debt financing, $0.6 million related to proceeds from the Employee Stock Purchase Plan and $0.2 million related to proceeds from the exercise of common stock options, partially offset by debt financing costs of $0.8 million.
Cash provided by financing activities: Net cash provided by financing activities for the year ended December 31, 2024 was $55.9 million and consisted of $32.5 million related to proceeds from the issuance of common stock through the ATM offering, $20.0 million related to proceeds under the Loan Agreement, $2.7 million related to proceeds from the exercise of common stock options, and $0.8 million related to proceeds from the Employee Stock Purchase Plan (“ESPP”), partially offset by $0.2 million related to debt financing costs.
The Loan Agreement provides for an additional tranche of up to $20.0 million, based on the timing and other conditions set forth in the Loan Agreement. On November 4, 2022, we entered into an Equity Distribution Agreement with Piper Sandler & Co., as agent, under which we may offer and sell, from time to time at our sole discretion, shares of our common stock having an aggregate offering price of up to $50.0 million in an “at-the-market” or ATM offering, to or through the agent.
We had $50.0 million in outstanding Term Loans under the Loan Agreement at December 31, 2024. On November 4, 2022, we entered into an Equity Distribution Agreement with Piper Sandler & Co., as agent, under which we may offer and sell, from time to time at our sole discretion, shares of our common stock having an aggregate offering price of up to $50.0 million in an “at-the-market” (“ATM”) offering, to or through the agent.
Revenue generated in the U.S. was $35.1 million for the year ended December 31, 2023, an increase of $17.1 million, or 95%, over the year ended December 31, 2022. HF revenue in the U.S. totaled $34.6 million and $17.6 million for the years ended December 31, 2023 and 2022, respectively.
Revenue generated in the U.S. was $47.2 million for the year ended December 31, 2024, an increase of $12.1 million, or 34%, over the year ended December 31, 2023. HF revenue units in the U.S. totaled 1,506 and 1,123 for the years ended December 31, 2024 and 2023, respectively.
Provision for income taxes Provision for income taxes was nominal for the years ended December 31, 2023 and 2022. Liquidity, capital resources and plan of operations We have incurred significant operating losses and negative cash flows from operations since our inception, and we anticipate that we will incur significant losses for at least the next several years.
Liquidity, capital resources and plan of operations We have incurred significant operating losses and negative cash flows from operations since our inception, and we anticipate that we will incur significant losses for at least the next several years. As of December 31, 2024 and 2023, we had cash and cash equivalents of $105.9 million and $90.6 million, respectively.
As a result, our financial statements may not be comparable to the financial statements of issuers who are required to comply with the effective dates for new or revised accounting standards that are applicable to public companies, which may make comparison of our financials to those of other public companies more difficult.
As a result, our financial statements may not be comparable to the financial statements of issuers who are required to comply with the effective dates for new or revised accounting standards that are applicable to public companies, which may make comparison of our financials to those of other public companies more difficult. 81 Table of Contents Recent accounting pronouncements A discussion of recent accounting pronouncements is included in Note 2 to our consolidated financial statements included elsewhere in this Annual Report on Form 10-K.
Longer term, we plan to explore Barostim’s potential to expand its indications for use to other cardiovascular diseases. On October 31, 2022, we entered into the Loan Agreement under which we may borrow, subject to our achievement of certain milestones, up to a total of $50.0 million in a series of Term Loans described in Note 4 to our consolidated financial statements included elsewhere in this Annual Report on Form 10-K, and we borrowed $7.5 million of such total on that date to fund our commercial and investment efforts.
On October 31, 2022, we entered into the Loan Agreement under which we may borrow, subject to our achievement of certain milestones, up to a total of $50.0 million in a series of Term Loans described in Note 4 to our consolidated financial statements included elsewhere in this Annual Report on Form 10-K.
This increase was primarily due to higher sales of Barostim. Gross profit was $33.0 million for the year ended December 31, 2023, an increase of $15.6 million, or 89%, over the year ended December 31, 2022. Gross margin increased to 84% for the year ended December 31, 2023, compared to 78% for the year ended December 31, 2022.
This increase was primarily due to higher sales of Barostim. Gross profit was $43.0 million for the year ended December 31, 2024, an increase of $9.9 million, or 30%, over the year ended December 31, 2023. Gross margin was 84% for both the years ended December 31, 2024 and 2023.
Selling, general and administrative expenses SG&A expenses increased $14.5 million, or 29%, to $64.5 million for the year ended December 31, 2023, compared to the year ended December 31, 2022.
Selling, general and administrative expenses SG&A expenses increased $26.8 million, or 42%, to $91.3 million for the year ended December 31, 2024, compared to the year ended December 31, 2023.
This change was primarily driven by a $1.7 million increase in compensation expenses, mainly as a result of increased headcount and a $0.6 million increase in non-cash stock-based compensation expense, partially offset by a $0.8 million decrease in clinical study expenses.
This change was driven by a $12.7 million increase in non-cash stock-based compensation expense, an $11.0 million increase in compensation expenses, mainly as a result of increased headcount, a $1.3 million increase in travel expenses, a $0.6 million increase in bad debt expenses, and a $0.5 million increase in consulting expenses.
Our net cash used in operating activities for the years ended December 31, 2023 and 2022, was $39.0 million and $42.7 million, respectively. 78 Table of Contents On October 31, 2022, we entered into the Loan Agreement under which we may borrow, subject to our achievement of certain milestones, up to a total of $50.0 million in a series of Term Loans described in Note 4 to our consolidated financial statements included elsewhere in this Annual Report on Form 10-K, and we borrowed $7.5 million of such total on that date to fund our commercial and investment efforts.
On October 31, 2022, we entered into the Loan Agreement under which we may borrow, subject to our achievement of certain milestones, up to a total of $50.0 million in a series of Term Loans described in Note 4 to our consolidated financial statements included elsewhere in this Annual Report on Form 10-K.
The new payment took effect January 1, 2024. Factors affecting our performance We believe there are several important factors that have impacted and that we expect will continue to impact our business and results of operations.
The APC payment of approximately $45,000 will continue in 2025, as published in the 2025 OPPS final rule. Factors affecting our performance We believe there are several important factors that have impacted and that we expect will continue to impact our business and results of operations.
If we are unable to obtain additional financing when needed to satisfy our liquidity requirements, we may be required to delay the commercialization and marketing of Barostim. 79 Table of Contents Cash flows The following table sets forth the primary sources and uses of cash for each of the periods presented below: Year ended December 31 (in thousands) 2023 2022 Net cash (used in) provided by: Operating activities $ (39,021) $ (42,677) Investing activities (591) (685) Financing activities 23,984 7,493 Effect of exchange rate changes on cash and cash equivalents 3 (9) Net change in cash and cash equivalents $ (15,625) $ (35,878) Cash used in operating activities Net cash used in operating activities for the year ended December 31, 2023 was $39.0 million and consisted primarily of a net loss of $41.2 million and a decrease in net operating assets of $4.8 million, partially offset by $6.3 million from non-cash stock-based compensation expense, $0.5 million from the depreciation of property and equipment and $0.2 million from amortization of deferred financing costs and loan discount.
Cash flows The following table sets forth the primary sources and uses of cash for each of the periods presented below: Year ended December 31 (in thousands) 2024 2023 Net cash (used in) provided by: Operating activities $ (39,144) $ (39,021) Investing activities (1,361) (591) Financing activities 55,870 23,984 Effect of currency exchange on cash and cash equivalents (1) 3 Net change in cash and cash equivalents $ 15,364 $ (15,625) Cash used in operating activities Net cash used in operating activities for the year ended December 31, 2024 was $39.1 million and consisted primarily of a net loss of $60.0 million, partially offset by $19.1 million from non-cash stock-based compensation expense, an increase in net operating assets of $0.9 million, $0.6 million from the depreciation of property and equipment, and $0.2 million from amortization of deferred financing costs and loan discount.
The number of sales territories in Europe remained consistent at six during the year ended December 31, 2023. 77 Table of Contents Cost of goods sold and gross margin Cost of goods sold increased $1.3 million, or 25%, to $6.3 million for the year ended December 31, 2023, compared to the year ended December 31, 2022.
As of December 31, 2024, we had five sales territories in Europe as compared to six sales territories as of December 31, 2023. Cost of goods sold and gross margin Cost of goods sold increased $2.1 million, or 33%, to $8.3 million for the year ended December 31, 2024, compared to the year ended December 31, 2023.
Other income, net Other income, net was $3.9 million for the year ended December 31, 2023, compared to $1.4 million for the year ended December 31, 2022. This increase was primarily driven by higher interest rates on interest-bearing accounts partially offset by a lower cash balance.
Other income, net Other income, net was $4.0 million for the year ended December 31, 2024, compared to $3.9 million for the year ended December 31, 2023. This increase was primarily driven by greater interest income on our interest-bearing accounts. Provision for income taxes Provision for income taxes was nominal for the years ended December 31, 2024 and 2023.
The term loans advanced pursuant to the Loan Agreement (collectively, the “Term 80 Table of Contents Loans”) bear interest at a floating rate per annum equal to the sum of (a) the greater of (i) the prime rate and (ii) 5.50% plus (b) 2.65%. The Term Loans mature on January 31, 2028 and require interest-only payments until November 1, 2027.
On September 30, 2024, we borrowed the remaining $20.0 million under the third and final tranche of the Loan Agreement. The term loans advanced pursuant to the Loan Agreement (collectively, the “Term Loans”) bear interest at a floating rate per annum equal to the sum of (a) the greater of (i) the prime rate and (ii) 5.50% plus (b) 2.65%.
Additional financing may not be available at all or may only be available in amounts or on terms that we do not deem to be favorable.
Additional financing may not be available at all or may only be available in amounts or on terms that we do not deem to be favorable. If we are unable to obtain additional financing when needed to satisfy our liquidity requirements, we may be required to delay the commercialization and marketing of Barostim.
On March 10, 2023, we borrowed the $7.5 million remaining under the first tranche of the Loan Agreement. On December 15, 2023, we borrowed $15.0 million under the second tranche of the Loan Agreement. We had $30.0 million in outstanding Term Loans under the Loan Agreement at December 31, 2023.
We had $50.0 million in outstanding Term Loans under the Loan Agreement at December 31, 2024.
Cash used in investing activities: Cash used in investing activities was $0.6 million and $0.7 million for the years ended December 31, 2023 and 2022, respectively, and consisted of purchases of property and equipment.
Net operating assets consisted primarily of inventory, accounts receivable, prepaid expenses and other current assets, accrued expenses to support the growth of our operations and accounts payable. 79 Table of Contents Cash used in investing activities: Cash used in investing activities was $1.4 million and $0.6 million for the years ended December 31, 2024 and 2023, respectively, and consisted of purchases of property and equipment.
Revenue generated in Europe was $4.2 million for the year ended December 31, 2023, a decrease of $0.3 million, or 6%, over the year ended December 31, 2022. Total revenue units in Europe decreased to 207 for the year ended December 31, 2023, from 231 for the prior year period.
As of December 31, 2024, we had 48 sales territories in the U.S. as compared to 38 sales territories as of December 31, 2023. Revenue generated in Europe was $4.1 million for the year ended December 31, 2024, a decrease of $0.1 million, or 1%, over the year ended December 31, 2023.
As of December 31, 2023 and 2022, we had cash and cash equivalents of $90.6 million and $106.2 million, respectively. For the years ended December 31, 2023 and 2022, our net losses were $41.2 million and $41.4 million, respectively.
For the years ended December 31, 2024 and 2023, our net losses were $60.0 million and $41.2 million, respectively. Our net cash used in operating activities for the years ended December 31, 2024 and 2023 was $39.1 million and $39.0 million, respectively.
Future expense amounts for any particular period could be affected by changes in our assumptions or market conditions. 81 Table of Contents ● Expected share price volatility — Due to the lack of company-specific historical and implied volatility data, we have based our estimate of expected volatility on the historical volatility of a group of similar (guideline) companies that are publicly traded.
Future expense amounts for any particular period could be affected by changes in our assumptions or market conditions. ● Expected share price volatility — We make assumptions with respect to expected stock price volatility based upon the historical volatility of our stock price. ● Expected term of an award — Determined based on our analysis of historical exercise behavior while taking into consideration various participant demographics and option characteristics.
Gross margin for the year ended December 31, 2023 was higher due to a decrease in the cost per unit and an increase in the average selling price. Research and development expenses R&D expenses increased $1.7 million, or 17%, to $11.6 million for the year ended December 31, 2023, compared to the year ended December 31, 2022.
Research and development expenses R&D expenses decreased $0.5 million, or 4%, to $11.1 million for the year ended December 31, 2024, compared to the year ended December 31, 2023.
As a result of these investments and our commercialization efforts, we expect to continue to incur net losses for the next several years, which may require additional funding and could include future equity and debt financing. 74 Table of Contents Recent developments In December 2023, the FDA approved expanded labeling for Barostim based on the BeAT-HF trial data, resulting in simplification and clarification of the indications for use as well as inclusion of the primary endpoint results, the 6, 12 and 24 month symptomatic data, the Win Ratio and the all-cause mortality data in the “Clinical Summary” discussion included in Barostim’s indications for use.
As a result of these investments and our commercialization efforts, we expect to continue to incur net losses for the next several years, which may require additional funding and could include future equity and debt financing. Recent developments On November 4, 2024, we announced that CMS assigned the Barostim procedure to New Technology APC 1580.
This change was driven by a $8.6 million increase in compensation expenses, mainly as a result of increased headcount, a $2.3 million increase in marketing and advertising expenses, primarily related to the commercialization of Barostim in the U.S., a $1.8 million increase in non-cash stock-based compensation expense, a $1.5 million increase in travel expenses and a $1.0 million increase in consulting expenses, partially offset by a $0.3 million decrease related to D&O insurance costs and a $0.2 million decrease in professional fees.
This change was primarily driven by a $0.5 million decrease in consulting expenses, a $0.3 million decrease in compensation expenses, and a $0.2 million decrease in travel expenses, partially offset by a $0.5 million increase in clinical study expenses.