Biggest changeOther Income, Net Other income, net consists primarily of interest income earned on our money market account balances and note receivables. 68 Table of Contents Results of Operations Comparison of the Years ended December 31, 2022 and 2021 Years ended December 31, Increase / (Decrease) 2022 2021 Dollars Percentage (in thousands, except percentages) Revenues $ 65,206 $ 55,312 $ 9,894 18 % Cost of revenues 15,483 11,653 3,830 33 % Gross Profit 49,723 43,659 6,064 14 % Gross Margin 76.3 % 78.9 % Operating expenses: Sales and marketing 49,982 37,746 12,236 32 % General and administrative 25,516 25,554 (38) (0) % Research and development 9,336 7,923 1,413 18 % Total operating expenses 84,834 71,223 13,611 19 % Loss from Operations (35,111) (27,564) (7,547) (27) % Other (income) expense: Interest expense 4,251 4,019 232 6 % Other income, net (2,203) (390) (1,813) (465) % Net Loss $ (37,159) $ (31,193) $ (5,966) (19) % Revenues by Geography Years ended December 31, 2022 2021 % of % of Amount Revenues Amount Revenues (in thousands, except percentages) United States $ 63,406 97 % $ 53,447 97 % International 1,800 3 % 1,865 3 % Total revenues $ 65,206 100 % $ 55,312 100 % U.S.
Biggest changeResults of Operations Comparison of the Years ended December 31, 2023 and 2022 Years ended December 31, Increase / (Decrease) 2023 2022 Dollars Percentage (in thousands, except percentages) Revenues $ 71,348 $ 65,206 $ 6,142 9 % Cost of revenues 19,643 15,483 4,160 27 % Gross Profit 51,705 49,723 1,982 4 % Gross Margin 72.5 % 76.3 % Operating expenses: Sales and marketing 47,318 49,982 (2,664) (5) % General and administrative 25,426 25,516 (90) (0) % Research and development 9,515 9,336 179 2 % Total operating expenses 82,259 84,834 (2,575) (3) % Loss from Operations (30,554) (35,111) 4,557 13 % Other (income) expense: Interest expense 5,424 4,251 1,173 28 % Other income, net (5,789) (2,203) (3,586) (163) % Net Loss $ (30,189) $ (37,159) $ 6,970 19 % 70 Table of Contents Revenues by Geography Years ended December 31, 2023 2022 % of % of Amount Revenues Amount Revenues (in thousands, except percentages) United States $ 69,336 97 % $ 63,406 97 % International 2,012 3 % 1,800 3 % Total revenues $ 71,348 100 % $ 65,206 100 % U.S.
The increase in net operating assets was primarily due to increases in accounts receivable, inventory and prepaid commission expense, which were offset by increases in accrued expenses as a result of timing and accrued 2022 compensation and commissions as of December 31, 2022.
The increase in net operating assets was primarily due to increases in accounts receivable, inventory and prepaid commission expense, which were offset by increases in accounts payable and accrued expenses as a result of timing and accrued 2022 compensation and commissions as of December 31, 2022.
Summary of Significant Accounting Policies” in our audited financial statements and related notes thereto appearing elsewhere in this Annual Report on Form 10-K, we believe the following discussion addresses our most critical accounting policies. 75 Table of Contents Revenue Recognition We account for revenue in accordance with Accounting Standards Codification (ASC) 606, Revenue from Contracts with Customers .
Summary of Significant Accounting Policies” in our audited financial statements and related notes thereto appearing elsewhere in this Annual Report on Form 10-K, we believe the following discussion addresses our most critical accounting policies. 76 Table of Contents Revenue Recognition We account for revenue in accordance with Accounting Standards Codification (ASC) 606, Revenue from Contracts with Customers .
Based on our commercial data, we believe psychiatrists can 65 Table of Contents recoup their initial capital investment in our system by providing a standard course of treatment to approximately 12 patients. We believe psychiatrists can generate approximately $8,500 of average revenue per patient for a standard course of treatment, which may provide meaningful incremental income to their practices.
Based on our commercial data, we believe psychiatrists can recoup their initial capital investment in our system by providing a standard course of treatment to approximately 12 patients. We believe psychiatrists can generate approximately $8,500 of average revenue per patient for a standard course of treatment, which may provide meaningful incremental income to their 67 Table of Contents practices.
Sales in the United States represented 97% of our total revenues for the years ending December 31, 2022 and 2021, respectively, and have been generated by our direct sales force. Outside the United States, our sales are made through local third-party distributors. International revenues were 3% for the years ended December 31, 2022 and 2021, respectively.
Sales in the United States represented 97% of our total revenues for the years ending December 31, 2023 and 2022, respectively, and have been generated by our direct sales force. Outside the United States, our sales are made through local third-party distributors. International revenues were 3% for the years ended December 31, 2023 and 2022, respectively.
As a result, we expect our research and development expenses to increase during 2023 compared to our 2022 expenses. Interest Expense Interest expense consists of cash interest payable under our credit facility and non-cash interest attributable to the accrual of final payment fees and the amortization of deferred financing costs related to our indebtedness.
As a result, we expect our research and development expenses to increase during 2024 compared to our 2023 expenses. Interest Expense Interest expense consists of cash interest payable under our credit facility and non-cash interest attributable to the accrual of final payment fees and the amortization of deferred financing costs related to our indebtedness.
Net cash used in investing activities for the year ended December 31, 2021 was attributable to issuance of our promissory note and purchases of property and equipment and capitalized software costs.
Net cash used in investing activities for the year ended December 31, 2021 was attributable to issuance of our promissory note and purchase of property and equipment and capitalized software costs.
Our current and future funding requirements will depend on many factors, including: ● the impact of COVID-19 and related governmental responses; ● our ability to achieve revenue growth and improve operating margins; ● compliance with the terms and conditions, including covenants, set forth in our credit facility; ● the cost of expanding our operations and offerings, including our sales and marketing efforts; ● our ability to improve or maintain coverage and reimbursement arrangements with domestic third-party and government payors, particularly in Japan; ● our rate of progress in establishing coverage and reimbursement arrangements from international commercial third-party and government payors; ● our rate of progress in, and cost of the sales and marketing activities associated with, establishing adoption of our products and maintaining or improving our sales to our current customers; ● the cost of research and development activities, including research and development relating to additional indications of neurohealth disorders; ● the effect of competing technological and market developments; ● costs related to international expansion; and ● the potential cost of and delays in product development as a result of any regulatory oversight applicable to our products.
Our current and future funding requirements will depend on many factors, including: ● our ability to achieve revenue growth and improve operating margins; ● compliance with the terms and conditions, including covenants, set forth in our credit facility; ● the cost of expanding our operations and offerings, including our sales and marketing efforts; ● our ability to improve or maintain coverage and reimbursement arrangements with domestic third-party and government payors, particularly in Japan; ● our rate of progress in establishing coverage and reimbursement arrangements from international commercial third-party and government payors; ● our rate of progress in, and cost of the sales and marketing activities associated with, establishing adoption of our products and maintaining or improving our sales to our current customers; 73 Table of Contents ● the cost of research and development activities, including research and development relating to additional indications of neurohealth disorders; ● the effect of competing technological and market developments; ● costs related to international expansion; and ● the potential cost of and delays in product development as a result of any regulatory oversight applicable to our products.
Our first commercial product, the NeuroStar Advanced Therapy System, is a non-invasive and non-systemic office-based treatment that uses transcranial magnetic stimulation, (“TMS”), to create a pulsed, MRI-strength magnetic field that induces electrical currents designed to stimulate specific areas of the brain associated with mood.
Our first commercial product, the NeuroStar Advanced Therapy System, is a non-invasive and non-systemic office-based treatment that uses TMS to create a pulsed, MRI-strength magnetic field that induces electrical currents designed to stimulate specific areas of the brain associated with mood.
Leases The Company has lease arrangements for equipment and certain facilities, including corporate headquarters and our warehouse in Malvern, Pennsylvania and a training facility in Charlotte, North Carolina. As of December 31, 2022, the Company had fixed lease payment obligations of $4.5 million, including $0.9 million due within the next twelve months.
Leases The Company has lease arrangements for equipment and certain facilities, including corporate headquarters and our warehouse in Malvern, Pennsylvania and a training facility in Charlotte, North Carolina. As of December 31, 2023, the Company had fixed lease payment obligations of $3.7 million, including $0.9 million due within the next twelve months.
NeuroStar Advanced Therapy System Revenues . NeuroStar Advanced Therapy System revenues consist primarily of sales or rentals of a capital component, including upgrades to the equipment attributable to the initial sale of the system. NeuroStar Advanced Therapy Systems can be purchased outright or on a rent-to-own basis by certain customers. Treatment Session Revenues .
NeuroStar Advanced Therapy System revenues consist primarily of sales or rentals of a capital component, including equipment upgrades to the initial sale of the system. NeuroStar Advanced Therapy Systems can be purchased outright or on a rent-to-own basis by certain customers. Treatment Session Revenues . Treatment session revenues primarily include sales of NeuroStar Treatment Sessions and SenStar treatment links.
Other significant sales and marketing costs include conferences and trade shows, promotional and marketing activities, including direct and online marketing, practice support programs, television and radio media campaigns, travel and training expenses.
Other significant sales and marketing costs include conferences and trade shows, promotional and marketing activities, including direct and online marketing, practice support programs, primarily digital media campaigns, travel and training expenses.
We incurred negative cash flows from operating activities of $30.7 million and $28.0 million for the years ended December 31, 2022 and 2021, respectively.
We incurred negative cash flows from operating activities of $32.0 million and $30.7 million for the years ended December 31, 2023 and 2022, respectively.
Net cash provided by financing activities for the year ended December 31, 2021 was $83.0 million and primarily consisted of additional proceeds from our secondary public offering and sale of our common stock on February 2, 2021 and cash proceeds related to stock option exercises.
Net cash provided by financing activities for the year ended December 31, 2021 was $83.0 million and primarily consisted of additional proceeds from our secondary public offering and sale of our common stock on February 2, 2021 and cash proceeds related to stock option exercises. 75 Table of Contents Indebtedness Refer to “Note 12.
We base the fair value of the training using stand-alone service rates. Our sales to our third-party distributors outside the United States do not have these post-sale obligations. In addition, we provide a one year warranty for systems sold in the United States.
We base the fair value of the training using stand-alone service rates. Our sales to our third-party distributors outside the United States do not have these post-sale obligations. In addition, we provide a one-year warranty for systems sold in the United States. Terms of product warranty differ amongst our third-party distributors outside the United States, but are generally one year.
Comparison of the Years ended December 31, 2021 and 2020 The information required within this section is incorporated by reference to the information set forth in the section titled “Comparison of the Years ended December 31, 2021 and 2020” in “Management’s Discussion and Analysis of our Financial Condition and Results of Operations” in our 2021 Annual Report on Form 10-K filed on March 8, 2022. Liquidity and Capital Resources Overview As of December 31, 2022, we had cash and cash equivalents of $70.3 million and an accumulated deficit of $345.9 million, compared to cash and cash equivalents of $94.1 million and an accumulated deficit of $308.7 million as of December 31, 2021.
Comparison of the Years ended December 31, 2022 and 2021 The information required within this section is incorporated by reference to the information set forth in the section titled “Comparison of the Years ended December 31, 2022 and 2021” in “Management’s Discussion 72 Table of Contents and Analysis of our Financial Condition and Results of Operations” in our 2022 Annual Report on Form 10-K filed on March 7, 2023. Liquidity and Capital Resources Overview As of December 31, 2023, we had cash and cash equivalents of $59.7 million and an accumulated deficit of $376.1 million, compared to cash and cash equivalents of $70.3 million and an accumulated deficit of $345.9 million as of December 31, 2022.
We use third-party contract manufacturing partners to produce the components for and assemble the completed NeuroStar Advanced Therapy Systems. Cost of revenues also includes costs related to personnel, royalties, warranty, shipping, and our operations and field service departments. We expect our cost of revenues to increase to the extent our revenues grow.
We use third-party contract manufacturing partners to produce the components for and assemble the completed NeuroStar Advanced Therapy Systems. Cost of revenues also includes costs related to personnel, royalties, warranty, shipping, amortization of capitalized software and our operations and field service departments.
Net cash provided by investing activities for the year ended December 31, 2022 was due to the repayment of our promissory note offset partially by purchases of property and equipment and capitalized software costs.
Net cash provided by investing activities for the year ended December 31, 2022 was attributable to repayment of a promissory note and purchases of property and equipment and capitalized software costs.
Debt”) (in thousands): Principal Year: Payments 2023 $ 13,125 2024 17,500 2025 4,375 2026 — 2027 — Total principal payments $ 35,000 Common Stock Offering On February 2, 2021, we closed a secondary public offering of our common stock in which we issued and sold 5,566,000 shares of our common stock, which included shares pursuant to an option granted to underwriters to purchase additional shares, at a public offering price of $15.50 per share.
Debt”) (in thousands): Principal Year: Payments 2024 $ — 2025 — 2026 22,500 2027 30,000 2028 7,500 Total principal payments $ 60,000 Common Stock Offering On February 2, 2021, we closed a secondary public offering of our common stock in which we issued and sold 5,566,000 shares of our common stock, which included shares pursuant to an option granted to underwriters to purchase additional shares, at a public offering price of $15.50 per share.
We expect to continue to expand our direct sales and customer support team to further penetrate the market by demonstrating the benefits of our NeuroStar Advanced Therapy to psychiatrists and their MDD patients. Some of our customers have and may purchase more than one NeuroStar Advanced Therapy System.
Our sales force targets an estimated 53,000 psychiatrists across 26,000 practices. We expect to continue to expand our direct sales and customer support team to further penetrate the market by demonstrating the benefits of our NeuroStar Advanced Therapy System to psychiatrists and their MDD patients. Some of our customers have and may purchase more than one NeuroStar Advanced Therapy System.
Treatment session revenues primarily include sales of NeuroStar Treatment Sessions and SenStar treatment links. The NeuroStar Treatment Sessions are access codes that are delivered electronically in the United States. The SenStar treatment links are disposable units containing single-use access codes that are sold and used outside the United States.
The NeuroStar Treatment Sessions are access codes that are delivered electronically in the United States. The SenStar treatment links are disposable units containing single-use access codes that are sold and used outside the United States.
Treatment sessions revenues represented 71% and 78% of total revenues in the United States for the years ended December 31, 2022 and 2021, respectively, and increased by 7% from $41.9 million for the year ended December 31, 2021 to $45.1 million for the year ended December 31, 2022.
Treatment sessions revenues represented 73% and 71% of total revenues in the United States for the years ended December 31, 2023 and 2022, respectively, and increased by 13% from $45.1 million for the year ended December 31, 2022 to $50.9 million for the year ended December 31, 2023.
Access codes are purchased separately by our customers, primarily on an as-needed basis, and are required by the NeuroStar Advanced Therapy System in order to deliver treatment sessions. Other Revenues . Other revenues are derived primarily from service and repair extended warranty contracts with our existing customers.
Access codes are purchased separately by our customers, primarily on an as-needed basis, and are required by the NeuroStar Advanced Therapy System in order to deliver treatment sessions. Other Revenues .
Our total revenues increased by $9.9 million, or 18%, from $55.3 million for the year ended December 31, 2021 to $65.2 million for the year ended December 31, 2022.
Our total revenues increased by $6.1 million, or 9%, from $65.2 million for the year ended December 31, 2022 to $71.3 million for the year ended December 31, 2023.
General and administrative expenses also include the cost of insurance, outside legal fees, accounting and other consulting services, audit fees from our independent registered public accounting firm, board of directors’ fees and other administrative costs, such as corporate facility costs, including rent, utilities, depreciation and maintenance not otherwise included in cost of revenues.
General and administrative expenses also include the cost of insurance, outside legal fees, accounting and other consulting services, audit fees from our independent registered public accounting firm, board of directors’ fees and other administrative costs, such as corporate facility costs, including rent, utilities, depreciation and maintenance not otherwise included in cost of revenues. 69 Table of Contents We anticipate that our general and administrative expenses will remain relatively consistent during 2024 compared to our 2023 expenses.
We believe the increase in overall volume of treatment session revenue between these two periods was primarily due to the growth in active customer sites of 142 from 959 as of December 31, 2021 to 1,101 as of December 31, 2022.
We 71 Table of Contents believe the increase in overall volume of treatment session revenue between these two periods was primarily due to the growth in active customer sites of 44 from 1,101 as of December 31, 2022 to 1,145 as of December 31, 2023 and increase in overall utilization.
The increase in U.S. treatment session revenue was primarily the result of an increase in 50,608 treatment sessions sold from 521,979 units for the year ended December 31, 2021 to 572,587 for the year ended December 31, 2022.
The increase in U.S. treatment session revenue was primarily the result of an increase of 218,244 treatment sessions sold from 572,587 units for the year ended December 31, 2022 to 791,023 for the year ended December 31, 2023.
Our gross profit is calculated by subtracting our cost of revenues from our revenues. We calculate our gross margin as our gross profit divided by our revenues. Our gross margin has been and will continue to be affected by a variety of factors, primarily product sales mix, pricing and third-party contract manufacturing costs.
Our gross margin has been and will continue to be affected by a variety of factors, primarily product sales mix, pricing and third-party contract manufacturing costs.
Critical Accounting Policies and Use of Estimates The preparation of our financial statements in accordance with accounting principles generally accepted in the United States, or GAAP, and the rules and regulations of the SEC requires us to make estimates and assumptions, based on judgments considered reasonable, which affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period.
GAAP and the rules and regulations of the SEC requires us to make estimates and assumptions, based on judgments considered reasonable, which affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period.
Our research and development efforts are focused on the following: hardware and software product developments and enhancements of our NeuroStar Advanced Therapy System and clinical development relating to additional indications.
We expect our international revenues to be consistent as a percentage of our total revenue. Our research and development efforts are focused on the following: hardware and software product developments and enhancements of our NeuroStar Advanced Therapy System and clinical development relating to additional indications.
Cash Flows The following table sets forth a summary of our cash flows for the years ended December 31, 2022, 2021, and 2020: December 31, 2022 2021 2020 Net Cash Used in Operating Activities $ (30,739) $ (27,983) $ (28,390) Net Cash Provided by (Used in) Investing Activities 6,731 (9,839) (730) Net Cash Provided by Financing Activities 207 83,006 2,369 Net (Decrease) Increase in Cash and Cash Equivalents $ (23,801) $ 45,184 $ (26,751) Net Cash Used in Operating Activities Net cash used in operating activities for 2022 was $30.7 million, consisting primarily of a net loss of $37.2 million and an increase in net operating assets of $4.8 million, partially offset by non-cash charges of $11.2 million.
Cash Flows The following table sets forth a summary of our cash flows for the years ended December 31, 2023, 2022, and 2021: December 31, 2023 2022 2021 Net Cash Used in Operating Activities $ (32,038) $ (30,739) $ (27,983) Net Cash (Used in) Provided by Investing Activities (1,322) 6,731 (9,839) Net Cash Provided by Financing Activities 22,697 207 83,006 Net (Decrease) in Cash and Cash Equivalents $ (10,663) $ (23,801) $ 45,184 74 Table of Contents Net Cash Used in Operating Activities Net cash used in operating activities for 2023 was $32.0 million, consisting primarily of a net loss of $30.2 million and an increase in net operating assets of $ 14 .1 million, partially offset by non-cash charges of $12.3 million.
Net cash used in investing activities for the year ended December 31, 2020 was attributable to purchases of property and equipment and capitalized software costs. Net Cash Provided by Financing Activities Net cash provided by financing activities for the year ended December 31 2022 was $0.2 million attributable primarily to proceeds related to stock option exercises.
Net cash provided by financing activities for the year ended December 31, 2022 was $0.2 million attributable primarily to proceeds related to stock option exercises.
Revenues by Product Category Years ended December 31, 2022 2021 % of % of Amount Revenues Amount Revenues (in thousands, except percentages) NeuroStar Advanced Therapy System $ 16,575 26 % $ 9,760 18 % Treatment sessions 45,077 71 % 41,933 78 % Other 1,754 3 % 1,754 4 % Total U.S. revenues $ 63,406 100 % $ 53,447 100 % 69 Table of Contents United States NeuroStar Advanced Therapy System Revenues by Type Years ended December 31, 2022 2021 % of % of Amount Revenues Amount Revenues (in thousands, except percentages) NeuroStar Capital $ 15,792 95 % $ 8,820 90 % Operating lease 222 2 % 279 3 % Other 561 3 % 661 7 % Total United States NeuroStar Advanced Therapy System revenues 16,575 100 % $ 9,760 100 % Revenues Total revenues increased by $9.9 million, or 18%, from $55.3 million for the year ended December 31, 2021 to $65.2 million for the year ended December 31, 2022.
Revenues by Product Category Years ended December 31, 2023 2022 % of % of Amount Revenues Amount Revenues (in thousands, except percentages) NeuroStar Advanced Therapy System $ 16,460 24 % $ 16,575 26 % Treatment sessions 50,896 73 % 45,077 71 % Other 1,980 3 % 1,754 4 % Total U.S. revenues $ 69,336 100 % $ 63,406 100 % United States NeuroStar Advanced Therapy System Revenues by Type Years ended December 31, 2023 2022 % of % of Amount Revenues Amount Revenues (in thousands, except percentages) NeuroStar capital $ 15,805 96 % $ 15,792 95 % Operating lease 162 1 % 222 1 % Other 493 3 % 561 3 % Total United States NeuroStar Advanced Therapy System revenues 16,460 100 % $ 16,575 100 % Revenues Total revenues increased by $6.1 million, or 9%, from $65.2 million for the year ended December 31, 2022 to $71.3 million for the year ended December 31, 2023.
We refer you to the section titled “Critical Accounting Policies and Use of Estimates—Revenue Recognition” appearing elsewhere in this Annual Report on Form 10-K for additional information regarding how we account for revenues.
Other revenues are derived primarily from service and repair extended warranty contracts with our existing customers. 68 Table of Contents We refer you to the section titled “Critical Accounting Policies and Use of Estimates—Revenue Recognition” appearing elsewhere in this Annual Report on Form 10-K for additional information regarding how we account for revenues.
Revenues in the United States increased by $10.0 million, or 19%, from $53.4 million for the year ended December 31, 2021 to $63.4 million for the year ended December 31, 2022.
Revenues in the United States increased by $5.9 million, or 9%, from $63.4 million for the year ended December 31, 2022 to $69.3 million for the year ended December 31, 2023.
For further information, refer to “Risk Factors” in “Item 1A” of this Annual Report on Form 10-K. 66 Table of Contents Components of Our Results of Operations Revenues To date, we have generated revenues primarily from the capital portion of our business and related sales and rentals of the NeuroStar Advanced Therapy System and the recurring revenues from our sale of treatment sessions in the United States.
Components of Our Results of Operations Revenues To date, we have generated revenues primarily from the capital portion of our business and related sales and rentals of the NeuroStar Advanced Therapy System and the recurring revenues from our sale of treatment sessions in the United States. NeuroStar Advanced Therapy System Revenues .
The Company expects to recognize future recurring treatment session revenue related to the sale of 213 NeuroStar Advanced Therapy systems, for the year ended December 31, 2022 compared to 147 units including 18 units recognized as operating leases for the December 31, 2021 period.
NeuroStar capital sales consisted of 204 units in NeuroStar Advanced Therapy Systems for the year ended December 31, 2023 compared to 213 units for the year ended December 31, 2022. The Company expects to recognize future recurring treatment session revenue related to the sale of 204 NeuroStar Advanced Therapy systems for the year ended December 31, 2023.
We obtained reimbursement coverage for NeuroStar Advanced Therapy in Japan, which went into effect on June 1, 2019 and covers patients who are treated in the largest inpatient and outpatient psychiatric facilities in Japan. We expect our international revenues to increase as a percentage of our total revenues as we grow our presence in Japan.
We received regulatory approval for our system in Japan in September 2017. We obtained reimbursement coverage for NeuroStar Advanced Therapy System in Japan, which went into effect on June 1, 2019 and covers patients who are treated in the largest inpatient and outpatient psychiatric facilities in Japan.
For the year ended December 31, 2022, our U.S. revenues were $63.4 million, compared to $53.4 million for the year ended December 31, 2021, which represented an increase of 19% period over period.
For the year ended December 31, 2023, our U.S. revenues were $69.3 million, compared to $63.4 million for the year ended December 31, 2022, which represented an increase of 9% period over period. As of December 31, 2023, we had an accumulated deficit of $376.1 million.
For the year ended December 31, 2022, revenues from sales of our treatment sessions and NeuroStar Advanced Therapy Systems represented 71% and 26% of our U.S. revenues, respectively. For the year ended December 31, 2021, revenues from sales of our treatment sessions and NeuroStar Advanced Therapy Systems represented 78% and 18% of our U.S. revenues, respectively.
We derive the majority of our revenues from recurring treatment sessions. For the year ended December 31, 2023, revenues from sales of our treatment sessions and NeuroStar Advanced Therapy Systems represented 73% and 24% of our U.S. revenues, respectively.
Other Income, Net Other income, net increased by $1.8 million from $0.4 million for the year ended December 31, 2021 to $2.2 million for the year ended December 31, 2022, primarily as a result of increased interest income earned on the Company’s money market accounts and note receivables.
Other Income, Net Other income, net increased by $3.5 million from $2.2 million for the year ended December 31, 2022 to $5.8 million for the year ended December 31, 2023, primarily as a result of the Employee Retention Credit (the “ERC”) of $2.9 million, increased interest income earned on the Company’s money market accounts and increase in notes receivable interest .
In October 2017, we entered into an exclusive distribution agreement with Teijin Pharma Limited, (“Teijin”), for the distribution of our NeuroStar Advanced Therapy Systems and treatment sessions to customers who will treat patients with MDD in Japan. We received regulatory approval for our system in Japan in September 2017.
International revenues represented 3% of our total revenues for the years ended December 31, 2023 and 2022, respectively. In October 2017, we entered into an exclusive distribution agreement with Teijin, for the distribution of our NeuroStar Advanced Therapy Systems and treatment sessions to customers who will treat patients with MDD in Japan.
We have incurred operating losses since our inception, and we anticipate that our operating losses will continue in the near term as we seek to expand our sales and marketing initiatives to support our growth in existing and new markets, invest funds in additional research and development activities and utilize cash for other corporate purposes. 71 Table of Contents Our primary sources of capital to date have been from our IPO, private placements of our convertible preferred securities, borrowings under our credit facility, sales of our products and a secondary public offering of our common stock.
We have incurred operating losses since our inception, and we anticipate that our operating losses will continue in the near term as we seek to expand our sales and marketing initiatives to support our growth in existing and new markets, invest funds in additional research and development activities and utilize cash for other corporate purposes.
Our gross margins on revenues from sales of NeuroStar Advanced Therapy Systems are lower than our gross margins on revenues from sales of treatment sessions and, as a result, the sales mix between NeuroStar Advanced Therapy Systems and treatment sessions can affect the gross margin in any reporting period. 67 Table of Contents Sales and Marketing Expenses Sales and marketing expenses consist of market research and commercial activities related to the sale of our NeuroStar Advanced Therapy Systems and treatment sessions and salaries and related benefits, sales commissions and share-based compensation for employees focused on these efforts.
Sales and marketing Expenses Sales and marketing expenses consist of market research and commercial activities related to the sale of our NeuroStar Advanced Therapy Systems and treatment sessions and salaries and related benefits, sales commissions and share-based compensation for employees focused on these efforts.
The Company’s material cash requirements include the following contractual and other obligations. 72 Table of Contents Debt As of December 31, 2022, the Company had $35.0 million of borrowings outstanding under the Solar credit facility, which has a final maturity in February 2025 (“maturity”). The interest rate on borrowings under the credit facility is variable and resets monthly.
The Company’s material cash requirements include the following contractual and other obligations. Debt In March 2020, the Company entered into the Solar Facility. As of December 31, 2023, the Company had $60.0 million of borrowings outstanding under the Solar Facility, which has a final maturity in March 2028.
Travel expense increased by $0.9 million driven by inflation and additional head count. General and Administrative Expenses General and administrative expenses remained relatively consistent at $25.5 million for the year ended December 31, 2022 compared with $25.6 million for the year ended December 31, 2021.
General and Administrative Expenses General and administrative expenses remained relatively consistent at $25.4 million for the year ended December 31, 2023 compared with $25.5 million for the year ended December 31, 2022.
Recent Accounting Pronouncements We refer you to “Note 4. Recent Accounting Pronouncements” in our audited financial statements and related notes thereto included elsewhere in this Annual Report on Form 10-K.
We also earn revenue from customers from services outside of their warranty term or annual service contracts. Such service revenue is recognized as the services are provided. Recent Accounting Pronouncements We refer you to “Note 4. Recent Accounting Pronouncements” in our audited financial statements and related notes thereto included elsewhere in this Annual Report on Form 10-K.
We currently sell our NeuroStar Advanced Therapy System and recurring treatment sessions in the United States through our sales and customer support team.
For the year ended December 31, 2022, revenues from sales of our treatment sessions and NeuroStar Advanced Therapy Systems represented 71% and 26% of our U.S. revenues, respectively. We currently sell our NeuroStar Advanced Therapy System and recurring treatment sessions in the United States through our sales and customer support team.
For the period ended December 31, 2022, U.S. revenue increased by 19% and international revenue marginally decreased by 3% over the comparative prior year period. The U.S. revenue growth was primarily due to an increase in NeuroStar Advanced Therapy System revenues.
For the period ended December 31, 2023, U.S. revenue increased by 9% and international revenue increased by 12% over the comparative prior year period. The U.S. revenue growth was primarily due to an increase in Treatment sessions revenues in connection with the growth of active customer sites and utilization.
Solar Credit Facility The following table sets forth by year our required future principal payments under the term loan portion of the Solar Facility (as discussed in “Note 12.
Debt” in our audited financial statements and related notes thereto appearing elsewhere in this Annual Report on Form 10-K for information regarding our current Solar Facility. Solar Credit Facility The following table sets forth by year our required future principal payments under the term loan portion of the Solar Facility (as discussed in “Note 12.
Management believes that the Company’s cash and cash equivalents as of December 31, 2022 and anticipated revenues from sales of its products are sufficient to fund the Company’s operations for at least 12 months from the issuance of these financial statements.
As of December 31, 2023, we had $60.0 million of borrowings outstanding under our credit facility, which has a final maturity in March 2028. Management believes that the Company’s cash and cash equivalents as of December 31, 2023 and anticipated revenues from sales of its products are sufficient to fund the Company’s operations for at least 12 months.
We generated revenues of $65.2 million and $55.3 million for the years ended December 31, 2022 and 2021, respectively. We designed the NeuroStar Advanced Therapy System as a non-invasive therapeutic alternative to treat patients who suffer from MDD and to address many of the key limitations of existing treatment options.
We designed the NeuroStar Advanced Therapy System as a non-invasive therapeutic alternative to treat patients who suffer from MDD and to address many of the key limitations of existing treatment options. We generate revenues from initial capital sales of our systems, sales of our recurring treatment sessions and from service and repair and extended warranty contracts.
Cost of Revenues and Gross Margin Future Issuance Cost of revenues increased by $3.8 million, or 33%, from $11.7 million for the year ended December 31, 2021 to $15.5 million for the year ended December 31, 2022. Gross margin was 76.3% for the year ended December 31, 2022 compared to 78.9% for the year ended December 31, 2021.
Cost of Revenues and Gross Margin Cost of revenues increased by $4.2 million, or 27%, from $15.5 million for the year ended December 31, 2022 to $19.6 million for the year ended December 31, 2023.
Non-cash charges consisted of depreciation and amortization, non-cash interest expense, share-based compensation, and the cost of rental units purchased by customers. Net cash used in operating activities for 2020 was $28.4 million, consisting primarily of a net loss of $27.5 million and an increase in net operating assets of $8.3 million, partially offset by non-cash charges of $7.3 million.
Net cash used in operating activities for 2022 was $30.7 million, consisting primarily of a net loss of $37.2 million and an increase in net operating assets of $4.8 million, partially offset by non-cash charges of $11.2 million.
Terms of product warranty differ amongst our third-party distributors outside the United States, but are generally one year. We provide for the estimated cost to repair or replace products under any warranty at the time of sale. We also offer our customers in the United States annual service contracts.
We provide for the estimated cost to repair or replace products under any warranty at the time of sale. We also offer our customers in the United States annual service contracts. Revenue from the sale of annual service contracts is recognized on a straight-line basis over the period of the applicable contract.
Research and Development Expenses Research and development expenses increased by $1.4 million, or 18%, from $7.9 million for the year ended December 31, 2021 to $9.3 million for the year ended December 31, 2022.
Research and Development Expenses Research and development expenses remained relatively consistent at $9.5 million for the year ended December 31, 2023 compared with $9.3 million for the year ended December 31, 2022 Interest Expense Interest expense increased by $1.2 million, or 28%, from $4.2 million for the year ended December 31, 2022 to $5.4 million for the year ended December 31, 2023 due to interest rates and debt balance increases.
The increase in net operating assets was primarily due to an increase in net investment in sales-type leases and prepaid commission expense, which were offset by a decrease in accrued expense due to timing and the 2020 payments of 2019 incentive compensation and commission accrued as of December 31, 2019. 73 Table of Contents Non-cash charges consisted of depreciation and amortization, non-cash interest expense, share-based compensation, and the cost of rental units purchased by customers, and the loss on debt extinguishment.
The increase in net operating assets was primarily due to increases in accounts receivable and prepaid commission expense, and decreases in accrued compensation. Non-cash charges consisted of depreciation and amortization, inventory impairment, non-cash interest expense, share-based compensation, and the cost of rental units purchased by customers.
Net Cash Provided by (Used in) Investing Activities Net cash provided by (used in) investing activities for the year ended December 31, 2022, 2021 and 2020 was $6.7 million, $(9.8) million and $(0.7) million, respectively.
Non-cash charges consisted of depreciation and amortization, non-cash interest expense, share-based compensation, and the cost of rental units purchased by customers. Net Cash (Used in) Provided by Investing Activities Net cash (used in) provided by investing activities for the years ended December 31, 2023, 2022 and 2021 was $(1.3) million, $6.7 million and $(9.8) million, respectively.
The decrease in gross margin was the result of a change in the product mix of revenue versus the prior year. 70 Table of Contents Sales and Marketing Expenses Sales and marketing expenses increased by $12.2 million, or 32%, from $37.7 million for the year ended December 31, 2021 to $50.0 million for the year ended December 31, 2022.
Sales and marketing Expenses Sales and marketing expenses decreased by $2.7 million, or 5%, from $50.0 million for the year ended December 31, 2022 to $47.3 million for the year ended December 31, 2023. The decrease was primarily driven by the discontinuation of a sales compensation program in 2023.
We have a diverse customer base of psychiatrists in group psychiatric practices in the United States. One customer accounted for more than 10% of our revenues for the years ended December 31, 2022 and 2021. Patients are reimbursed by Medicare and the vast majority of commercial payors in the United States for treatment sessions utilizing our NeuroStar Advanced Therapy System.
We have a diverse customer base of psychiatrists in group psychiatric practices in the United States. For the years ended December 31, 2023, 2022 and 2021 one customer accounted for 15%, 17% and 20% respectively, of the Company’s revenue.
We anticipate that our general and administrative expenses will remain materially consistent during 2023 compared to our 2022 expenses.
We anticipate that our sales and marketing expenses will remain materially consistent during 2024 compared to 2023 expenses, with the exception of the planned growth in our co-op marketing program.
The system is cleared by the United States Food and Drug Administration, (“FDA”), to treat adult patients with major depressive disorder, (“MDD”), that have failed to achieve satisfactory improvement from prior antidepressant medication in the current MDD episode.
The system is cleared by the FDA to treat adult patients with MDD that have failed to achieve satisfactory improvement from prior antidepressant medication in the current MDD episode. NeuroStar Advanced Therapy System is safe, clinically effective, reproducible and precise and we believe is supported by the largest clinical data set of any competing TMS system.
NeuroStar Advanced Therapy is safe, clinically effective, reproducible and precise and we believe is supported by the largest clinical data set of any competing TMS system. We believe we are the market leader in TMS therapy based on the estimated 147,431 global patients treated with over 5.3 million of our treatment sessions through December 31, 2022.
We believe we are the market leader in TMS therapy based on the estimated 169,068 global patients treated with over 6.1 million of our treatment sessions through December 31, 2023. We generated revenues of $71.3 million and $65.2 million for the years ended December 31, 2023 and 2022, respectively.
NeuroStar Advanced Therapy System revenue in the United States increased by $6.8 million, or 70%, for the year ended December 31, 2022 compared to the year ended December 31, 2021. The increase was primarily driven by a 79% increase in NeuroStar Advanced Therapy System capital revenue, which includes capital sales and sales-type leases.
NeuroStar Advanced Therapy System revenue in the United States for year ended December 31, 2023 was $16.5 million which was in line with revenue at December 31, 2022 at $16.6 million.
Under the current facility, the Company will be required to make a final payment fee of $1.9 million at maturity. Future interest payments related to the current facility total $5.4 million, including $3.7 million due within the next twelve months as of December 31, 2022.
Future interest payments related to the facility total $22.0 million, including $6.7 million due within the next twelve months as of December 31, 2023. On March 7, 2024, the Company entered into a sixth amendment (the “Solar Sixth Amendment”) to the Solar Facility.
We market our products in a few select markets outside the United States through independent distributors. International revenues represented 3% and 3% of our total revenues for the years ended December 31, 2022 and 2021, respectively.
Patients are reimbursed by federal healthcare programs and the vast majority of commercial payors in the United States for treatment sessions utilizing our NeuroStar Advanced Therapy System. We market our products in a few select markets outside the United States through independent distributors.
Net cash provided by financing activities for the year ended December 31, 2020 was $2.4 million and attributable primarily to proceeds from the exercise of stock options. 74 Table of Contents Indebtedness Refer to “Note 12.
Net Cash Provided by Financing Activities Net cash provided by financing activities for the year ended December 31, 2023 was $22.7 million attributable primarily to additional debt net of final payment and amendment fee paid in connection with the two amendments of the Solar Facility in 2023.
Prior to the Company commencing principal payments on the facility in March 2023 with total borrowings of $35.0 million coming due in monthly installments, the Company and Solar agreed to delay the first principal payment while negotiating a refinanced credit facility.
The interest rate on borrowings under the credit facility is variable and resets monthly. The Company will commence principal payments on the facility starting April 2026 with total borrowings of $60.0 million due at maturity. In addition, the Company will make a final payment fee of $1.9 million at maturity.