Biggest changeLoss on loan extinguishment Loss on loan extinguishment was a result of our acquisition price of our new debt exceeded the carrying amount of our existing debt. 84 Table of Contents Results of Operations Comparison of Years Ended December 31, 2023 and 2022 The following table shows our results of operations for the years ended December 31, 2023 and 2022: Year Ended December 31, Change 2023 2022 $ % (in thousands, except percentages) Revenue $ 136,191 $ 75,014 $ 61,177 82 % Cost of sales 65,142 37,929 27,213 72 Gross profit 71,049 37,085 33,964 92 Gross margin 52 % 49 % Operating expenses: Research and development 48,446 28,981 19,465 67 Selling, general and administrative 131,773 88,828 42,945 48 Total operating expenses 180,219 117,809 62,410 53 Loss from operations (109,170) (80,724) (28,446) (35) Interest expense (3,995) (5,183) 1,188 23 Interest and other income, net 7,268 2,011 5,257 261 Loss on loan extinguishment — (3,258) 3,258 N/M Net loss $ (105,897) $ (87,154) (18,743) (22) N/M - Not meaningful.
Biggest changeResults of Operations Comparison of Years Ended December 31, 2024 and 2023 The following table shows our results of operations for the years ended December 31, 2024 and 2023: Year Ended December 31, Change 2024 2023 $ % (in thousands, except percentages) Revenue $ 224,498 $ 136,191 88,307 65 Cost of sales 87,399 65,142 22,257 34 Gross profit 137,099 71,049 66,050 93 Gross margin 61 % 52 % Operating expenses: Research and development 62,298 48,446 13,852 29 Selling, general and administrative 171,415 131,773 39,642 30 Total operating expenses 233,713 180,219 53,494 30 Loss from operations (96,614) (109,170) 12,556 12 Interest expense (4,184) (3,995) (189) (5) Interest and other income, net 9,385 7,268 2,117 29 Net loss $ (91,413) $ (105,897) 14,484 14 Revenue Year Ended December 31, Change 2024 2023 $ % (in thousands, except percentages) System sales and rentals $ 90,299 $ 58,920 31,379 53 Hand pieces and other consumables 121,456 69,522 51,934 75 Service 12,743 7,749 4,994 64 Total revenue $ 224,498 $ 136,191 88,307 65 Revenue increased $88.3 million, or 65%, to $224.5 million during the year ended December 31, 2024, compared to $136.2 million during the year ended December 31, 2023.
The cash used in operations was primarily due to our net loss due to the increase in operating expenses to support our commercialization and development activities.
The cash used in operations was primarily due to our net loss due to the increase in operating expenses to support our commercialization and development activities.
We plan to leverage these recent successes in our active discussions with all commercial payors to establish additional positive national and regional coverage policies. Outside of the United States, we have ongoing efforts in key markets to expand established coverage and improve payment which we believe will expand patient access to Aquablation therapy.
We plan to leverage these successes in our active discussions with all commercial payors to establish additional positive national and regional coverage policies. Outside of the United States, we have ongoing efforts in key markets to expand established coverage and improve payment which we believe will expand patient access to Aquablation therapy.
Our future funding requirements will depend on many factors, including: • the degree and rate of market acceptance of our products and Aquablation therapy; • the scope and timing of investment in our sales force and expansion of our commercial organization; • the scope, rate of progress and cost of our current or future clinical trials and registries; • the cost of our research and development activities; • the cost and timing of additional regulatory clearances or approvals; • the costs associated with any product recall that may occur; • the costs associated with the manufacturing of our products at increased production levels; • the costs of attaining, defending and enforcing our intellectual property rights; • whether we acquire third-party companies, products or technologies; 86 Table of Contents • the terms and timing of any other collaborative, licensing and other arrangements that we may establish; • the emergence of competing technologies or other adverse market developments; and • the rate at which we expand internationally.
Our future funding requirements will depend on many factors, including: • the degree and rate of market acceptance of our products and Aquablation therapy; • the scope and timing of investment in our sales force and expansion of our commercial organization; • the scope, rate of progress and cost of our current or future clinical trials and registries; • the cost of our research and development activities; • the cost and timing of additional regulatory clearances or approvals; 84 Table of Contents • the costs associated with any product recall that may occur; • the costs associated with the manufacturing of our products at increased production levels; • the costs of attaining, defending and enforcing our intellectual property rights; • whether we acquire third-party companies, products or technologies; • the terms and timing of any other collaborative, licensing and other arrangements that we may establish; • the emergence of competing technologies or other adverse market developments; and • the rate at which we expand internationally.
The expansion of our commercialization resulted in an increases in inventory, accounts receivable, and long-term assets, a decrease in other accrued liabilities, partially offset by a decrease in prepaid expenses and other current assets, and increases in accounts payable, deferred revenue, lease liabilities, accrued compensation and accrued interest expense. Non-cash charges consisted primarily of stock-based compensation, and depreciation.
The expansion of our commercialization resulted in an increase in inventory, accounts receivable, and long-term assets, a decrease in other accrued liabilities, partially offset by a decrease in prepaid expenses and other current assets, and increases in accounts payable, deferred revenue, lease liabilities, accrued compensation and accrued interest expense. Non-cash charges consisted primarily of stock-based compensation, and depreciation.
We expect our increase in revenues in absolute dollars to be larger in the United States. Cost of Sales and Gross Margin Cost of sales consists primarily of manufacturing overhead costs, material costs, warranty and service costs, direct labor and other direct costs such as shipping costs.
We expect our increase in revenues in absolute dollars to be larger in the United States. Cost of Sales and Gross Margin Cost of sales consists primarily of manufacturing overhead costs, material costs, warranty and service costs, direct labor, scrap and other direct costs such as shipping costs.
As we increase our install base of AquaBeam Robotic systems we expect our revenue to increase as a result of the system sale and resulting utilization. • Increase system utilization: Our revenue is significantly impacted by the utilization of our AquaBeam robotic system.
As we increase our install base of robotic systems, we expect our revenue to increase as a result of the system sale and resulting utilization. • Increase system utilization: Our revenue is significantly impacted by the utilization of our robotic systems.
Operating Expenses Research and Development Research and development, or R&D, expenses consist primarily of engineering, product development, regulatory affairs, consulting services, materials, depreciation and other costs associated with products and technologies being developed. These expenses include employee and non-employee compensation, including stock-based compensation, supplies, materials, quality assurance expenses, consulting, related travel expenses and facilities expenses.
Operating Expenses Research and Development Research and development, or R&D, expenses consist primarily of engineering, product development, regulatory affairs, consulting services, clinical trial expenses, materials, depreciation and other costs associated with products and technologies being developed. These expenses include employee and non-employee compensation, including stock-based compensation, supplies, materials, quality assurance expenses, consulting, related travel expenses and facilities expenses.
We are obligated to maintain in deposit accounts held at the lender equal to at least the lesser of (i) $90.0 million or (ii) all of our non-operating cash. The loan and security agreement contains certain customary representations and warranties, affirmative and negative covenants, and events of default.
We are obligated to maintain in deposit accounts held at the lender equal to at least the lesser of (i) $100.0 million or (ii) all of our non-operating cash. The loan and security agreement contains certain customary representations and warranties, affirmative and negative covenants, and events of default.
We expect our SG&A expenses to increase in absolute dollars for the foreseeable future as we expand our commercial infrastructure and incur additional fees associated with operating as a public company, including legal, accounting, insurance, compliance with the rules and regulations of the SEC and those of any stock exchange on which our securities are traded, investor relations, and other administrative and professional services expenses, though it may fluctuate from quarter to quarter.
We expect our SG&A expenses to increase in absolute dollars for the foreseeable future as we expand our commercial infrastructure and incur additional fees associated with operating as a public company, including legal, accounting, insurance, compliance with the rules and regulations of the SEC and those of 82 Table of Contents any stock exchange on which our securities are traded, investor relations, and other administrative and professional services expenses, though it may fluctuate from quarter to quarter.
A detailed discussion comparing our results of operations for the years ended December 31, 2022 and 2021 can be found in Part II, Item 7, “Management’s Discussion and Analysis of Financial Condition and Results of Operations” of our Annual Report on Form 10-K for the year ended December 31, 2022.
A detailed discussion comparing our results of operations for the years ended December 31, 2023 and 2022 can be found in Part II, Item 7, “Management’s Discussion and Analysis of Financial Condition and Results of Operations” of our Annual Report on Form 10-K for the year ended December 31, 2023.
We designed Aquablation therapy to deliver effective, safe and durable outcomes for males suffering from lower urinary tract symptoms, or LUTS, due to BPH that are independent of prostate size and shape, and delivers resection independent of surgeon experience.
We designed Aquablation therapy to deliver effective, safe and durable outcomes for males suffering from lower urinary tract symptoms, or LUTS, due to BPH that is independent of prostate size and shape, and delivers resection independent of surgeon experience.
Net Cash Provided by Financing Activities During the year ended December 31, 2023, net cash provided by financing activities was $167.8 million, consisting primarily of proceeds from the issuance of common stock of $161.7 million, net o f issuance costs, and proceeds of $2.5 million from the exercise of stock options.
During the year ended December 31, 2023, net cash provided by financing activities was $167.8 million, consisting primarily of proceeds from the issuance of common stock of $161.7 million, net of issuance costs, and proceeds of $2.5 million from the exercise of stock options.
Each AquaBeam Robotic System is shipped to our customers with a third-party manufactured ultrasound system and probe.
Each robotic system is shipped to our customers with a third-party manufactured ultrasound system and probe.
Overview We are a surgical robotics company focused on advancing patient care by developing transformative solutions in urology. We develop, manufacture and sell the AquaBeam Robotic System, an advanced, image-guided, surgical robotic system for use in minimally invasive urologic surgery, with an initial focus on treating benign prostatic hyperplasia, or BPH.
Overview We are a surgical robotics company focused on advancing patient care by developing transformative solutions in urology. We develop, manufacture and sell the AquaBeam Robotic System and HYDROS Robotic System, which are advanced, image-guided, surgical robotic systems for use in minimally invasive urologic surgery, with an initial focus on treating benign prostatic hyperplasia, or BPH.
Please also see the section titled “Cautionary Note Regarding Forward-Looking Statements.” The following generally compares our results of operations for the years ended December 31, 2023 and 2022.
Please also see the section titled “Cautionary Note Regarding Forward-Looking Statements.” The following generally compares our results of operations for the years ended December 31, 2024 and 2023.
If factors change and we employ different assumptions, stock-based compensation expense may differ significantly from what we have recorded in the past. If there are any modifications or cancellations of the underlying unvested securities, we may be required to accelerate, increase or cancel any remaining unearned stock-based compensation expense.
If factors change and 88 Table of Contents we employ different assumptions, stock-based compensation expense may differ significantly from what we have recorded in the past. If there are any modifications or cancellations of the underlying unvested securities, we may be required to accelerate, increase or cancel any remaining unearned stock-based compensation expense.
BPH is the most common prostate disease and impacts approximately 40 million men in the United States. The AquaBeam Robotic System employs a single-use disposable handpiece to deliver our proprietary Aquablation therapy, which combines real-time, multi-dimensional imaging, personalized treatment planning, automated robotics and heat-free waterjet ablation for targeted and rapid removal of prostate tissue.
BPH is the most common prostate disease and impacts approximately 40 million men in the United States. Each of our robotic systems employs a single-use disposable handpiece to deliver our proprietary Aquablation therapy, which combines real-time, multi-dimensional imaging, personalized treatment planning, automated robotics and heat-free waterjet ablation for targeted and rapid removal of prostate tissue.
See Note 7 to our consolidated financial statements included elsewhere in this Annual Report Form 10-K for information concerning certain of the specific assumption we used in applying the Black-Scholes option pricing model to determine the fair value of our stock options granted in the years ended December 31, 2023 and 2022.
See Note 8 to our consolidated financial statements included elsewhere in this Annual Report Form 10-K for information concerning certain of the specific assumption we used in applying the Black-Scholes option pricing model to determine the fair value of our stock options granted in the years ended December 31, 2024 and 2023.
We designed our AquaBeam Robotic System to enable consistent and reproducible BPH surgery outcomes. We believe that Aquablation therapy represents a paradigm shift in the surgical treatment of BPH by addressing compromises associated with alternative surgical interventions.
We designed our robotic systems to enable consistent and reproducible BPH surgery outcomes. We believe that Aquablation therapy represents a paradigm shift in the surgical treatment of BPH by addressing compromises associated with alternative surgical interventions.
The minimum revenue and growth covenant requires our revenue, for the consecutive twelve-month period as of each measurement date, of not less than $50.0 million and of at least 115% as of the last day of the consecutive twelve-month period of the immediately preceding year.
The minimum revenue and growth covenant requires our revenue, for the consecutive twelve-month period as of each measurement date, of not less than $50.0 million and of at least 115% as of the last day of the consecutive twelve-month 85 Table of Contents period of the immediately preceding year.
The results of our operations will depend, in part, on our ability to increase our gross margins by more effectively managing our costs to produce our AquaBeam Robotic System and single-use disposable handpieces, and to scale our manufacturing operations efficiently.
The results of our operations will depend, in part, on our ability to increase our gross margins by more effectively managing our costs to produce our robotic Systems and single-use disposable handpieces, and to scale our manufacturing operations efficiently.
However, we expect our R&D expenses as a percentage of revenue to vary over time depending on the level and timing of initiating new product development efforts. 83 Table of Contents Selling, General and Administrative Selling, general and administrative, or SG&A, expenses consist primarily of compensation for personnel, including stock-based compensation, related to selling, marketing, clinical affairs, professional education, finance, information technology, and human resource functions.
However, we expect our R&D expenses as a percentage of revenue to vary over time depending on the level and timing of initiating new product development efforts. Selling, General and Administrative Selling, general and administrative, or SG&A, expenses include compensation for personnel, including stock-based compensation, related to selling, marketing, clinical affairs, professional education, finance, information technology, and human resource functions.
Revenue Recognition Revenue is derived primarily from the sales of the AquaBeam Robotic Systems, and handpieces that are for one-time use during each surgery using the AquaBeam Robotic System. The AquaBeam Robotic System contains both software and non-software components that are delivered together as a single product and generally contain a one-year warranty.
Revenue Recognition Revenue is derived primarily from the sales of the AquaBeam Robotic Systems and HYDROS Robotic Systems, along with handpieces that are for one-time use during each surgery using our robotic systems. Each of our robotic systems contains both software and non-software components that are delivered together as a single product and generally contain a one-year warranty.
We are currently developing additional and next generation technologies to support and improve Aquablation therapy to further satisfy the evolving needs of surgeons and their patients as well as to further enhance the usability and scalability of the AquaBeam Robotic System.
We are currently developing additional and next generation technologies to support and improve Aquablation therapy to further satisfy the evolving needs of surgeons and their patients as well as to further enhance the usability and scalability of our robotic systems.
We manufacture the AquaBeam Robotic System, the handpiece, integrated scope and other accessories at our facility in San Jose, California. This includes supporting the supply chain distribution and logistics of the various components. Components, sub-assemblies and services required to manufacture our products are purchased from numerous global suppliers.
We manufacture the robotic systems, the single-use disposable handpiece, integrated scope and other accessories at our facility in San Jose, California. This includes supporting the supply chain distribution and logistics of the various components. Components, sub-assemblies and services required to manufacture our products are purchased from numerous global suppliers.
Net Cash Used in Investing Activities During the year ended December 31, 2023, net cash used in investing activities was $25.2 million, consisting of purchases of property and equipment. During the year ended December 31, 2022, net cash used in investing activities was $2.7 million, consisting of purchases of property and equipment.
Net Cash Used in Investing Activities During the year ended December 31, 2024, net cash used in investing activities was $4.4 million, consisting of purchases of property and equipment. During the year ended December 31, 2023, net cash used in investing activities was $25.2 million, consisting of purchases of property and equipment.
These factors include: • Grow our install base of AquaBeam Robotic Systems: As of December 31, 2023, we had an install base of 418 AquaBeam Robotic Systems globally, including 315 in the United States. In the United States, we are initially focused on driving adoption of Aquablation therapy among urologists that perform hospital-based resective BPH surgery.
These factors include: • Grow our install base of robotic systems: As of December 31, 2024, we had an install base of 647 robotic systems globally, including 505 in the United States. In the United States, we are initially focused on driving adoption of Aquablation therapy among urologists that perform hospital-based resective BPH surgery.
Other revenue is derived primarily from service and repair and extended service contracts with our existing customers. We expect our revenue to increase in absolute dollars for the foreseeable future as we continue to focus on driving adoption of Aquablation therapy, and increased system utilization, though it may fluctuate from quarter to quarter.
Additionally, we also derive revenue from service and repair and extended service contracts with our existing customers. We expect our revenue to increase in absolute dollars for the foreseeable future as we continue to focus on driving adoption of Aquablation therapy, and increased system utilization, though it may fluctuate from quarter to quarter.
As of December 31, 2023, we had an accumulated deficit of $454.6 million. Factors Affecting Our Performance We believe there are several important factors that have impacted and that we expect will impact our operating performance and results of operations for the foreseeable future.
As of December 31, 2024, we had an accumulated deficit of $546.0 million. Factors Affecting Our Performance We believe there are several important factors that have impacted and that we expect will impact our operating performance and results of operations for the foreseeable future.
We have developed a significant and growing body of clinical evidence, which includes over 150 peer-reviewed publications, supporting the benefits and clinical advantages of Aquablation therapy. As of December 31, 2023, we had an install base of 418 AquaBeam Robotic Systems globally, including 315 in the United States.
We have developed a significant and growing body of clinical evidence, which includes nine clinical studies and over 150 peer-reviewed publications, supporting the benefits and clinical advantages of Aquablation therapy. As of December 31, 2024, we had an install base of 647 AquaBeam Robotic Systems and HYDROS Robotic Systems globally, including 505 in the United States.
As of December 31, 2023, we had cash and cash equivalents of $257.2 million, an accumulated deficit of $454.6 million, and $52.0 million outstanding on our loan facility. We expect our expenses will increase for the foreseeable future, as we continue to make substantial investments in sales and marketing, operations and research and development.
As of December 31, 2024, we had cash and cash equivalents of $333.7 million, an accumulated deficit of $546.0 million, and $52.0 million outstanding on our loan facility. We expect our expenses will increase for the foreseeable future, as we continue to make substantial investments in sales and marketing, operations and research and development.
The contracts are typically in the form of a master agreement and a purchase order from the customer. Our AquaBeam Robotic System sales generally contain multiple products and services and can include a combination of the following performance obligations: robotic system, handpieces and consumables, and service.
The contracts are typically in the form of an agreement and an ordering document from our customer. Sales generally contain multiple products and services and can include a combination of the following performance obligations: robotic system, handpieces and consumables, and service.
We utilize a well-known third-party logistics provider located in the United States and the Netherlands to ship our products to our customers globally. 81 Table of Contents We generated revenue of $136.2 million and $75.0 million, for the years ended December 31, 2023 and 2022, respectively, and incurred a net loss of $105.9 million and $87.2 million for the years ended December 31, 2023 and 2022, respectively.
We utilize a well-known third-party logistics provider located in the United States and the Netherlands to ship our products to our customers globally. 80 Table of Contents We generated revenue of $224.5 million and $136.2 million, for the years ended December 31, 2024 and 2023, respectively, and incurred a net loss of $91.4 million and $105.9 million for the years ended December 31, 2024 and 2023, respectively.
As a result of our strong KOL network and our compelling clinical evidence, Aquablation therapy has been added to clinical guidelines of various professional associations, including the American Urological Association. In the United States, we sell our products to hospitals.
As a result of our strong KOL network and our compelling clinical evidence, Aquablation therapy has been added to clinical guidelines of various professional associations, including the American Urological Association. In the United States, we sell our products to hospitals. We target approximately 2,700 hospitals that perform resective BPH procedures in the United States.
Liquidity and Capital Resources Overview We completed a follow-on offering of common stock in August 2023, which raised $161.7 million, net of issuance costs. Previously, our primary sources of capital have been from our initial public offering, private placements of redeemable convertible preferred securities and debt financing agreements.
Liquidity and Capital Resources Overview We completed a follow-on offering of common stock in October 2024, which raised $164.5 million in proceeds to us, net of issuance costs. Previously, our primary sources of capital have been from our initial public offering, private placements of redeemable convertible preferred securities and debt financing agreements.
To penetrate these hospitals, we expect to continue to increase our direct team of capital sales representatives, who are focused on driving system placement within hospitals by engaging with key surgeons and decision makers to educate them about the compelling value proposition of Aquablation therapy.
We target approximately 2,700 hospitals that perform resective BPH procedures in the United States. To penetrate these hospitals, we expect to continue to increase our direct team of capital sales representatives, who are focused on driving system placement within hospitals by engaging with key surgeons and decision makers to educate them about the compelling value proposition of Aquablation therapy.
The following table presents revenue by significant geographical locations for the periods indicated: Year Ended December 31, 2023 2022 United States 91 % 90 % Outside the United States 9 % 10 % We expect that both our U.S. and international revenue will increase in the near term as we continue to expand the install base of AquaBeam Robotic Systems and increase the related customer utilization.
The following table presents revenue by significant geographical locations for the periods indicated: Year Ended December 31, 2024 2023 United States 89 % 91 % Outside the United States 11 % 9 % We expect that both our United States and international revenue will increase in the near term as we continue to expand the install base of our robotic systems and increase the related single-use disposable handpieces sold.
The expected term of stock options represents the weighted-average period that the stock options are expected to remain outstanding. We estimated the expected term based on the simplified method, which is the average of the weighted-average vesting period and contractual term of the option. Expected Volatility.
We estimated the expected term based on the simplified method, which is the average of the weighted-average vesting period and contractual term of the option. Expected Volatility.
We generally recognize revenue for the performance obligations at the following points in time: AquaBeam Robotic Systems - For systems (including system components and system accessories) sold directly to end customers, revenue is recognized when we transfer control to the customer, which is generally at the time of delivery.
We generally recognize revenue for the performance obligations at the following points in time: AquaBeam Robotic Systems and HYDROS Robotic Systems End user sales - For systems (including system components and system accessories) sold directly to end user customers, revenue is recognized when we transfer control to our customer, in accordance with agreed upon shipping terms.
Cost of Sales and Gross Margin Cost of sales increased $27.2 million, or 72%, to $65.1 million during the year ended December 31, 2023, compared to $37.9 million during the year ended December 31, 2022. The increase in cost of sales was primarily attributable to the growth in the number of units sold.
Cost of Sales and Gross Margin Cost of sales increased $22.3 million, or 34%, to $87.4 million during the year ended December 31, 2024, compared to $65.1 million during the year ended December 31, 2023. The increase in cost of sales was primarily attributable to the growth in the number of units sold.
Interest and Other Income, Net Interest and other income, net, increased $5.3 million to $7.3 million during the year ended December 31, 2023 compared to $2.0 million during the year ended December 31, 2022. The increase in interest and other income, net was primarily due to higher interest rates earned on our money market funds.
Interest and other income, net, increased $2.1 million to $9.4 million during the year ended December 31, 2024 compared to $7.3 million during the year ended December 31, 2023. The increase in interest and other income, net was primarily due to higher interest rates earned on our cash equivalents.
Healthcare providers in the United States generally rely on third-party payors, principally federal Medicare, state Medicaid and private health insurance plans, to cover all or part of the cost of procedures using our AquaBeam Robotic System.
Healthcare providers in the United States generally rely on third-party payors, principally federal Medicare, state Medicaid and private health insurance plans, to cover all or part of the cost of procedures using our robotic system. The revenue we are able to generate from sales of our products depends in large part on the availability of sufficient reimbursement from such payors.
Standalone selling prices are based on observable prices at which we separately sell the products or services. If a standalone selling price is not directly observable, then we estimate the standalone selling price considering market conditions and entity-specific factors including, but not limited to, features and functionality of the products and services, geographies, and type of customer.
If a standalone selling price is not directly observable, then we estimate the standalone selling price considering market conditions and entity-specific factors including, but not limited to, features and functionality of the products and services, geographies, and type of customer. We regularly review standalone selling prices and update these estimates as necessary.
Outside of the United States, we have ongoing efforts in key markets to expand established coverage and further improve patient access to Aquablation therapy. • Cost of sales.
We believe that additional commercial payor coverage will contribute to increasing utilization of our system over time. Outside of the United States, we have ongoing efforts in key markets to expand established coverage and further improve patient access to Aquablation therapy. • Cost of sales.
During the year ended December 31, 2022, net cash used in operating activities was $80.4 million, consisting primarily of a net loss of $87.2 million and an increase in net operating assets of $11.5 million, partially offset by non-cash charges of $18.3 million.
During the year ended December 31, 2023, net cash used in operating activities was $108.0 million, consisting primarily of a net loss of $105.9 million and an increase in net operating assets of $26.2 million, partially offset by non-cash charges of $24.1 million.
The expansion of our commercialization resulted in an increase in inventory, accounts receivable and prepaid expenses and other current assets, partially offset by an increase in other current liabilities, accrued compensation and accrued interest expense. Non-cash charges consisted primarily of stock-based compensation, depreciation, and loss on loan extinguishment.
The expansion of our commercialization resulted in increases in inventory, accounts receivable, prepaid expenses and other current assets along with long-term assets, a decrease in accounts payable, partially offset by an increase in accrued compensation, deferred revenue, lease liabilities, and accrued interest expense. Non-cash charges consisted primarily of stock-based compensation, accruals for excess and obsolete inventory and depreciation.
The growth in revenue was primarily attributable to an increase of $19.2 million and $37.7 million in revenues from higher sales volumes of both our AquaBeam Robotic System and our single-use disposable handpieces.
The growth in revenue was primarily attributable to an increase 83 Table of Contents of $31.4 million and $51.9 million in revenues from higher sales volumes of both our robotic systems and our single-use disposable handpieces.
The increase in gross margin was primarily attributable to the growth in unit sales, which allowed us to spread the fixed portion of our manufacturing overhead costs over more production units, partially offset by increases in scrap and warranty costs.
Gross margin increased to 61% during the year ended December 31, 2024, compared to 52% for the year ended December 31, 2023. The increase in gross margin was primarily attributable to the growth in unit sales, which allowed us to spread the fixed portion of our manufacturing overhead costs over more production units, and decreases in scrap and warranty costs.
The valuation model used for calculating the fair value of awards for stock options is the Black-Scholes option pricing model. The Black-Scholes option pricing model requires us to make assumptions and judgments about the variables used in the calculation, including the following: Expected Term .
The Black-Scholes option pricing model requires us to make assumptions and judgments about the variables used in the calculation, including the following: Expected Term . The expected term of stock options represents the weighted-average period that the stock options are expected to remain outstanding.
The increase in SG&A expenses was primarily due to employee-related expenses of our sales and marketing organization and administrative organizations as we expanded our infrastructure to drive and support our growth in revenue.
The increase in SG&A expenses was primarily due to employee-related expenses of our sales and marketing organization and administrative organizations as we expanded our infrastructure to drive and support our growth in revenue. Interest Expense Interest expense of $4.2 million during the year ended December 31, 2024 remained relatively flat compared to fiscal 2023.
We regularly review standalone selling prices and update these estimates as necessary. We recognize revenue as the performance obligations are satisfied by transferring control of the product or service to a customer.
We recognize revenue as the performance obligations are satisfied by transferring control of the product or service to our customer.
Stock-Based Compensation We account for stock options granted to employees and directors under the fair value recognition provision of ASC 718, Compensation - Stock Compensation. Stock-based compensation expense is recognized over the requisite service period in the statements of operations and comprehensive loss. We use the straight-line method for expense attribution.
Stock-based compensation expense is recognized over the requisite service period in the statements of operations and comprehensive loss. We use the straight-line method for expense attribution. The valuation model used for calculating the fair value of awards for stock options is the Black-Scholes option pricing model.
We also plan to leverage our treatment data and software development capabilities to integrate artificial intelligence and machine learning to enable computer-assisted anatomy 82 Table of Contents recognition and improved treatment planning and personalization. Our future growth is dependent on these continuous improvements which require significant resources and investment.
We also plan to leverage our treatment data and software development capabilities to integrate artificial intelligence and machine learning to enable computer-assisted anatomy recognition and improved treatment planning and personalization.
The term loan facility is scheduled to mature on October 6, 2027, the fifth anniversary of the Closing Date (the "Maturity Date"). The loan and security agreement provides for interest-only payments on the term loan facility for the first thirty-six months following the Closing Date (the "Initial Interest-Only Period").
The loan and security agreement provides for interest-only payments on the term loan facility for the first thirty-six months following the Closing Date (the “Initial Interest-Only Period”).
Loss on loan extinguishment Loss on loan extinguishment decreased to zero during the year ended December 31, 2023 compared to $3.3 million during the year ended December 31, 2022. The increase in loss on loan extinguishment was due to our reacquisition price of our new debt exceeded the carrying amount of our existing debt in the prior year.
Loss on loan extinguishment Loss on loan extinguishment was a result of our acquisition price of our new debt exceeded the carrying amount of our existing debt during the fiscal year ended December 31, 2022.
If we maintain at least $100.0 million in available cash, then it is not required to meet such financial covenants. 87 Table of Contents Cash Flows The following table summarizes our cash flows for the years ended December 31, 2023, 2022, and 2021: Year Ended December 31, 2023 2022 2021 (in thousands) Net cash provided by (used in): Operating activities $ (108,003) $ (80,382) $ (57,334) Investing activities (25,206) (2,653) (592) Financing activities 167,795 3,612 262,116 Net increase (decrease) in cash, cash equivalents and restricted cash $ 34,586 $ (79,423) $ 204,190 Net Cash Used in Operating Activities During the year ended December 31, 2023, net cash used in operating activities was $108.0 million, consisting primarily of a net loss of $105.9 million and an increase in net operating assets of $26.2 million, partially offset by non-cash charges of $24.1 million.
Cash Flows The following table summarizes our cash flows for the years ended December 31, 2024, 2023, and 2022: Year Ended December 31, 2024 2023 2022 (in thousands) Net cash provided by (used in): Operating activities $ (99,213) $ (108,003) $ (80,382) Investing activities (4,409) (25,206) (2,653) Financing activities 180,125 167,795 3,612 Net increase (decrease) in cash, cash equivalents and restricted cash $ 76,503 $ 34,586 $ (79,423) Net Cash Used in Operating Activities During the year ended December 31, 2024, net cash used in operating activities was $99.2 million, consisting primarily of a net loss of $91.4 million and an increase in net operating assets of $47.3 million, partially offset by non-cash charges of $39.5 million.
The Company determines the transaction price it expects to be entitled to in exchange for transferring the promised product to the customer, which is based on the invoiced price for the products. All prices are at fixed amounts per the sales agreement with the customer.
We determine the transaction price we expect to be entitled to in exchange for transferring the promised product to our customer, which is based on the invoiced price for the products. All prices are at fixed amounts per the contract with the customer. We have granted rebates on a limited basis and have been historically immaterial.
We believe that these favorable coverage decisions have been a catalyst for hospital adoption of our AquaBeam Robotic System. We believe our strong body of clinical evidence and support from key societies, supplemented by the momentum from Medicare coverage, have led to favorable coverage decisions from many large commercial payors.
We believe our strong body of clinical evidence and support from key societies, supplemented by the momentum from Medicare coverage, have led to favorable coverage decisions from many large commercial payors. We plan to leverage these successes in our active discussions with commercial payors to establish additional positive national and regional coverage policies.
Proceeds from the term loan facility were used to repay and terminate our previous loan facility, transaction fees, and related expenses. Proceeds from the term loan facility was used to repay and terminate the our previous loan facility, transaction fees, and related expenses.
Proceeds from the term loan facility were used to repay and terminate our previous loan facility, transaction fees, and related expenses. The term loan facility is scheduled to mature on October 6, 2027, the fifth anniversary of the Closing Date (the “Maturity Date”).
Components of Our Results of Operations Revenue We generate our revenue primarily from the capital portion of our business, which includes sales and rentals of our AquaBeam Robotic System, and from the recurring revenue associated with sales of our single-use disposable handpieces that are used during each surgery performed with our system.
Our future growth is dependent on these continuous improvements which require significant resources and investment. 81 Table of Contents Components of Our Results of Operations Revenue We generate our revenue primarily from the sales and rentals of our robotic systems, sales of our single-use disposable handpieces that are used during each surgery performed with our system, and related accessories.
Contractual Commitments and Contingencies The information included in Note 11 to the consolidated financial statements included in Part II, Item 8 of this Annual Report on Form 10-K is incorporated herein by reference.
Contractual Commitments and Contingencies The information included in Note 12 to the consolidated financial statements included in Part II, Item 8 of this Annual Report on Form 10-K is incorporated herein by reference. 86 Table of Contents Off-Balance Sheet Arrangements We did not have during the periods presented, and we do not currently have any off-balance sheet arrangements, such as structured finance, special purpose entities or variable interest entities.
Selling, General and Administrative Expenses SG&A expenses increased $42.9 million, or 48%, to $131.8 million during the year ended December 31, 2023, compared to $88.8 million during the year ended December 31, 2022.
These expenses support ongoing product improvements and the development of additional and next generation technologies. Selling, General and Administrative Expenses SG&A expenses increased $39.6 million, or 30%, to $171.4 million during the year ended December 31, 2024, compared to $131.8 million during the year ended December 31, 2023.
The increase in R&D expenses was primarily due to employee- 85 Table of Contents related expenses from increased headcount of our R&D organization, as well as increases in third-party product development costs. These expenses support ongoing product improvements and the development of additional and next generation technologies.
Research and Development Expenses R&D expenses increased $13.9 million, or 29%, to $62.3 million during the year ended December 31, 2024, compared to $48.4 million during the year ended December 31, 2023. The increase in R&D expenses was primarily due to employee-related expenses from increased headcount of our R&D organization, as well as increases in third-party product development costs.
The revenue we are able to generate from sales of our products depends in large part on the availability of sufficient reimbursement from such payors. Effective in 2021, all local MACs, representing 100% of eligible Medicare patients, issued final positive local coverage determinations to provide Medicare beneficiaries with access to Aquablation therapy in all 50 states.
Effective in 2021, all local MACs, representing 100% of eligible Medicare patients, issued final positive local coverage determinations to provide Medicare beneficiaries with access to Aquablation therapy in all 50 states. We believe that these favorable coverage decisions have been a catalyst for hospital adoption of our robotic systems.
The preparation of the financial statements requires us to make estimates and assumptions for the reported amounts of assets, liabilities, revenue, expenses and related disclosures.
Critical Accounting Policies and Estimates Management’s discussion and analysis of our financial condition and results of operations is based on our financial statements, which have been prepared in accordance with U.S. generally accepted accounting principles. The preparation of the financial statements requires us to make estimates and assumptions for the reported amounts of assets, liabilities, revenue, expenses and related disclosures.
Hand pieces and other consumables - Revenue from sales of handpieces and other consumables is recognized when control is transferred to the customers, which generally occurs at the time of shipment but also occurs at the time of delivery. 89 Table of Contents Service - Service revenue, inclusive of the amounts associated with the AquaBeam Robotic System warranties, is recognized over the term of the service period, as the customer benefits from the services throughout the service period.
Service - Service revenue, inclusive of the amounts associated with the robotic system warranties or extended service agreements, is recognized over the term of the service period, as the customer benefits from the services throughout the service period.
During the year ended December 31, 2022, net cash provided by financing activities was $3.6 million, consisting primarily of proceeds from the issuance of long-term debt of $51.2 million, net of issuance costs, proceeds of $4.0 million from the exercise of stock options, partially offset by the payment of principal of long-term debt of $50.0 million and prepayment fees associated with our previous loan facility.
Net Cash Provided by Financing Activities During the year ended December 31, 2024, net cash provided by financing activities was $180.1 million, consisting primarily of proceeds from the issuance of common stock of $164.5 million, net o f issuance costs, and proceeds of $11.1 million from the exercise of stock options.
The Company generally issues no discounts or other price concessions or a right of return, once the agreement is signed. The Company has granted rebates on a limited basis, and those rebates have been historically immaterial. For multiple-element arrangements, revenue is allocated to each performance obligation based on its relative standalone selling price.
Rebates are recorded as a reduction to revenue at time of sale. For multiple-element arrangements, revenue is allocated to each performance obligation based on its relative standalone selling price. Standalone selling prices are based on observable prices at which we separately sell the products or services.
If collectability is not assured at the time of shipment, we defer revenue until such criteria have been met. Our standard terms and conditions of sale do not allow for product returns, and we generally do not allow product returns, except in the case of damaged goods, and we have not experienced any significant returns of our products.
If collectability is not assured at the time of shipment, we defer revenue until such criteria have been met. Stock-Based Compensation We account for stock options granted to employees and directors under the fair value recognition provision of ASC 718, Compensation - Stock Compensation.