Biggest changeAs part of our liquidity strategy, we will continue to monitor our capital structure and operating plans and we may access the capital markets or debt markets for additional funding if the opportunity arises to enhance our capital structure for changes to our operating plans, for financing strategic initiatives and to provide financial flexibility. 77 Cash Flows The following is a summary of cash flows for each of the periods set forth below (in thousands): Year Ended December 31, 2022 2021 Net cash used in operating activities $ (66,312) $ (56,078) Net cash provided by (used in) investing activities 26,882 (148,749) Net cash provided by financing activities 41,762 220,083 Net increase in cash and cash equivalents $ 2,332 $ 15,256 Net cash used in operating activities Net cash used in operating activities was $66.3 million for the year ended December 31, 2022, and consisted of a $184.2 million gain in the fair value of derivatives on convertible notes, a $43.7 million gain on fair value adjustment of options, a $2.5 million net change in operating assets and liabilities, partially offset by net income of $142.1 million, $13.3 million related to depreciation/amortization and other non-cash items, $8.6 million of stock-based compensation, and $0.1 million of loss on issuance of options. Net cash used in operating activities was $56.1 million for the year ended December 31, 2021, and consisted of a net loss of $302.5 million, a net change in operating assets and liabilities of $1.5 million, and $0.3 million of loss on extinguishment of debt, offset by a change in fair value of derivative liabilities of $174.2 million, a change of $53.2 million in the fair value adjustment related to the Energy Capital transactions, other non-cash charges, net of $9.6 million, stock-based compensation expense of $9.0 million, and $2.2 million of impairment costs. Net cash provided by (used in) investing activities Net cash provided by investing activities was $26.9 million for the year ended December 31, 2022, and consisted of $131.9 million from the sale and maturity of marketable securities, offset by $104.7 million from the purchase of marketable securities and $0.3 million of capital expenditures for laboratory equipment. Net cash used in investing activities was $148.7 million for the year ended December 31, 2021, and consisted of $154.5 million from the purchase of marketable securities and $0.2 million of capital expenditures for laboratory equipment, offset by $6.0 million form sale and maturity of marketable securities. Net cash provided by financing activities Net cash provided by financing activities was $41.8 million for the year ended December 31, 2022, and primarily consisted of $12 million proceeds from the issuance of Series B preferred stock related to the Energy Capital option exercise, $34.2 million from issuance of common stock, and $1.1 million for proceeds related to exercise of stock options and warrants, offset by $2.9 million in repayment of the PPP loan and $2.6 million taxes paid related to net share settlement of equity awards. Net cash provided by financing activities was $220.1 million for the year ended December 31, 2021, and primarily consisted of $200.4 million from issuance of common stock, proceeds of $22.8 million for the issuance of Series A preferred stock and $5.0 million for proceeds related to exercise of stock options and warrants, offset by repayment of $2.8 million of PPP loan and $5.3 million taxes paid related to net share settlement of equity awards. 78
Biggest changeAs part of our liquidity strategy, we will continue to monitor our capital structure and operating plans and we may access the capital markets or debt markets for additional funding if the opportunity arises to enhance our capital structure for changes to our operating plans, for financing strategic initiatives and to provide financial flexibility. 80 Cash Flows The following is a summary of cash flows for each of the periods set forth below (in thousands): Year Ended December 31, 2023 2022 Net cash used in operating activities $ (70,163) $ (66,312) Net cash provided by investing activities 89,713 26,882 Net cash provided by financing activities 20,366 41,762 Net increase in cash and cash equivalents $ 39,916 $ 2,332 Net cash used in operating activities Net cash used in operating activities was $70.2 million for the year ended December 31, 2023, and consisted of a net loss of $60.4 million, a $14.1 million exchange-related gain, a $6.6 million gain in the fair value of derivatives on convertible notes, and a $4.0 million net change in operating assets and liabilities, partially offset by $8.7 million of stock-based compensation, and $6.3 million related to depreciation/amortization and other non-cash items. Net cash used in operating activities was $66.3 million for the year ended December 31, 2022, and consisted of a $184.2 million gain in the fair value of derivatives on convertible notes, a $43.7 million gain on fair value adjustment of options, a $2.5 million net change in operating assets and liabilities, partially offset by net income of $142.1 million, $13.3 million related to depreciation/amortization and other non-cash items, $8.6 million of stock-based compensation, and $0.1 million of loss on extinguishment of options. Net cash provided by investing activities Net cash provided by investing activities was $89.7 million for the year ended December 31, 2023, and consisted of $158.6 million from the sale and maturity of marketable securities, offset by $68.5 million from the purchase of marketable securities and $0.4 million of capital expenditures for laboratory equipment and leasehold improvements. Net cash provided by investing activities was $26.9 million for the year ended December 31, 2022, and consisted of $131.9 million from the sale and maturity of marketable securities, offset by $104.7 million from the purchase of marketable securities and $0.3 million of capital expenditures for laboratory equipment. Net cash provided by financing activities Net cash provided by financing activities was $20.4 million for the year ended December 31, 2023, and primarily consisted of $7.4 million in proceeds related to the issuance of common stock and the exercise of stock options and warrants, $14.7 million in proceeds from the issuance of the PHC Purchase Warrant, and $24.4 million in net proceeds from borrowings pursuant to the Loan and Security Agreement, partially offset by $15.7 million and $7.5 million in repayment of the 2023 and 2025 notes, respectively, $2.7 million taxes paid related to net share settlement of equity awards, and $0.4 million in debt issuance costs. Net cash provided by financing activities was $41.8 million for the year ended December 31, 2022, and primarily consisted of $12 million in proceeds from the issuance of Series B preferred stock related to the Energy Capital option exercise, $34.2 million from issuance of common stock, and $1.1 million for proceeds related to exercise of stock options and warrants, offset by $2.9 million in repayment of the PPP loan and $2.6 million taxes paid related to net share settlement of equity awards. 81
We are paid for our sales directly to the Customers, regardless of whether or not the Customers resell the products to health care providers and patients. Revenue from product sales is recognized at a point in time when the Customers obtain control of our product based upon the delivery terms as defined in the contract at an amount that reflects the consideration which we expect to receive in exchange for the product.
We are generally paid for our sales directly to the Customers, regardless of whether or not the Customers resell the products to health care providers and patients. Revenue from product sales is recognized at a point in time when the Customers obtain control of our product based upon the delivery terms as defined in the contract at an amount that reflects the consideration which we expect to receive in exchange for the product.
The Warrant was exercised in full in February 2022. 75 On August 9, 2020, we entered into a financing agreement with Ascensia’s parent company, PHC Holdings Corporation (“PHC”), pursuant to which we issued $35.0 million in aggregate principal amount of Senior Secured Convertible Notes due on October 31, 2024 (the “PHC Notes”), to PHC on the Closing Date.
The Warrant was exercised in full in February 2022. On August 9, 2020, we entered into a financing agreement with Ascensia’s parent company, PHC Holdings Corporation (“PHC”), pursuant to which we issued $35.0 million in aggregate principal amount of Senior Secured Convertible Notes due on October 31, 2024 (the “PHC Notes”), to PHC on the Closing Date.
Depending on the variable consideration, we develop estimates for the expected value based on the terms of the agreements, historical data, geographic mix, reimbursement rates, and market conditions. Contract assets consist of trade receivables and unbilled receivables from customers and are recorded at net realizable value.
Depending on the variable consideration, we develop 74 estimates for the expected value based on the terms of the agreements, historical data, geographic mix, reimbursement rates, and market conditions. Contract assets consist of trade receivables and unbilled receivables from customers and are recorded at net realizable value.
We do not expect any material changes in the near term to the underlying assumptions during the year ended December 31, 2023. We base our estimates on historical experience and various other assumptions that we believe are reasonable under the circumstances, the results of which form the basis for making judgments about the carrying value of assets, liabilities and equity that are not readily apparent from other sources.
We do not expect any material changes in the near term to the underlying assumptions during the year ended December 31, 2024. We base our estimates on historical experience and various other assumptions that we believe are reasonable under the circumstances, the results of which form the basis for making judgments about the carrying value of assets, liabilities and equity that are not readily apparent from other sources.
We also issued PHC 2,941,176 shares of common stock to PHC as a financing fee. We also have the option to sell and issue PHC up to $15.0 million of convertible preferred stock on or before December 31, 2022, contingent upon obtaining approval for the 180-day Eversense E3 product for marketing in the United States before such date.
We also issued PHC 2,941,176 shares of common stock to PHC as a financing fee. We also had the option to sell and issue PHC up to $15.0 million of convertible preferred stock on or before December 31, 2022, contingent upon obtaining approval for the 180-day Eversense E3 product for marketing in the United States before such date.
In June 2019, we received FDA approval for the non-adjunctive indication (dosing claim) for the Eversense system. With this approval and the availability of a new app in December 2019, the Eversense system can now be used as a therapeutic CGM in the United States to replace fingerstick blood glucose measurement to make treatment decisions, including insulin dosing.
In June 2019, we received FDA approval for the non-adjunctive indication (dosing claim) for the 90-day Eversense system. With this approval and the availability of a new app in December 2019, the Eversense system can now be used as a therapeutic CGM in the United States to replace fingerstick blood glucose measurement to make treatment decisions, including insulin dosing.
These estimates, particularly estimates relating to accounting for variable consideration related to revenue and embedded derivatives, have a material impact on our financial statements and are discussed in detail throughout our analysis of the results of operations discussed below. We did not make any material changes to these assumptions for the year ended December 31, 2022.
These estimates, particularly estimates relating to accounting for variable consideration related to revenue and embedded derivatives, have a material impact on our financial statements and are discussed in detail throughout our analysis of the results of operations discussed below. We did not make any material changes to these assumptions for the year ended December 31, 2023.
This sub-set of 30 participants were left undisturbed for 365 days with the goal of measuring accuracy and longevity over the full 365 days.
This sub-set of 72 30 participants were left undisturbed for 365 days with the goal of measuring accuracy and longevity over the full 365 days.
We have received Category III CPT codes for the insertion and removal of the Eversense sensor. In December 2018, we initiated the PROMISE pivotal clinical trial to evaluate the safety and accuracy of Eversense for a period of up to 6 months in the United States. In September 30, 2019, we completed enrollment of the PROMISE trial.
We have received Category III CPT codes for the insertion and removal of the Eversense sensor. In December 2018, we initiated the PROMISE pivotal clinical trial to evaluate the safety and accuracy of Eversense for a period of up to six months in the United States and in September 30, 2019, we completed enrollment of the PROMISE trial.
Based on the data from this trial, in October 2016 we submitted a PMA application to the FDA to market Eversense in the United States for 90-day use. On June 21, 2018, we received PMA approval from the FDA for the 90-day Eversense system.
Based on the data from this trial, in October 2016 we submitted a pre-market approval (“PMA”) application to the FDA to market Eversense in the United States for 90-day use. On June 21, 2018, we received PMA approval from the FDA for the Eversense system.
As described in Note 21, on March 13, 2023, we entered into an agreement with PHC, whereby PHC has agreed to exchange the PHC Notes for a warrant (the “Exchange Warrant”) to purchase up to 68,525,311 shares of common stock. The Exchange Warrant is a “pre-funded” warrant with a nominal exercise price of $0.001 per share.
As described in Note 21, on March 13, 2023, we entered into an agreement with PHC, whereby PHC has agreed to exchange the PHC Notes for a warrant (the “PHC Exchange Warrant”) to purchase up to 68,525,311 shares of common stock. The 78 Exchange Warrant is a “pre-funded” warrant with a nominal exercise price of $0.001 per share.
We had previously obtained this indication for Eversense in the United States 70 in 2019.
We had previously obtained this indication for Eversense in the United States in 2019.
On August 3, 2020, CMS released its Calendar Year 2021 Medicare Physician Fee Schedule Proposed Rule that announces proposed policy changes for Medicare payments, including the proposed establishment of national payment amounts for the three CPT© Category III codes describing the insertion (CPT 0446T), removal (0447T), and removal and insertion (0048T) of an implantable interstitial glucose sensor, which describes our Eversense CGM systems, as a medical benefit, rather than as part of the Durable Medical Equipment channel that includes other CGMs.
On August 3, 2020, the Center for Medicare and Medicaid Services (“CMS”) released its Calendar Year 2021 Medicare Physician Fee Schedule Proposed Rule that announces proposed policy changes for Medicare payments, including the proposed establishment of national payment amounts for the three CPT© Category III codes describing the insertion (CPT 0446T), removal (0447T), and removal and insertion (0048T) of an implantable interstitial glucose sensor, which describes our Eversense CGM systems, as a medical benefit, rather than as part of the Durable Medical Equipment channel that includes other CGMs.
This MRI approval is a first for the CGM category, as all other sensors are required to be removed during an MRI scan. On August 9, 2020, we entered into a collaboration and commercialization agreement with Ascensia pursuant to which we granted Ascensia the exclusive right to distribute our 90-day Eversense CGM system and our 180-day Eversense E3 CGM system worldwide for people with diabetes, with the following initial exceptions: (1) until January 31, 2021, the territory did not include territories covered by our then existing distribution agreement with Roche Diagnostics International AG and Roche Diabetes Care GmbH, which are the Europe, Middle East and Asia, excluding Scandinavia and Israel, and 17 additional countries, including Brazil, Russia, India and China, as well as select markets in the Asia Pacific and Latin American regions; (2) until September 13, 2021, the territory did not include countries covered by our current distribution agreement with Rubin Medical, which are Sweden, Norway and Denmark; and (3) until May 31, 2022, the territory did not include Israel.
This MRI approval is a first for the CGM category, as all other sensors are required to be removed during an MRI scan. On August 9, 2020, we entered into a collaboration and commercialization agreement with Ascensia (the “Commercialization Agreement”) pursuant to which we granted Ascensia the exclusive right to distribute our 90-day Eversense CGM system and our 180-day Eversense E3 CGM system worldwide, with the following initial exceptions: (i) until January 31, 2021, the territory did not include territories covered by our then existing distribution agreement with Roche Diagnostics International AG and Roche Diabetes Care GmbH, which are the Europe, Middle East and Asia, excluding Scandinavia and Israel, and 17 additional countries, including Brazil, Russia, India and China, as well as select markets in the Asia Pacific and Latin American regions; (ii) until September 13, 2021, the territory did not include countries covered by our current distribution agreement with Rubin Medical, which are Sweden, Norway and Denmark; and (iii) until May 31, 2022, the territory did not include Israel.
In November 2022, CMS released its Calendar Year 2023 Medicare Physician Fee Schedule Proposed Rule that updates the payment amounts for the three CPT© Category III codes to account for the longer 6-month sensor.
In November 2022, CMS released its Calendar Year 2023 Medicare Physician Fee Schedule Proposed Rule that updates the payment amounts for the three CPT© Category III codes to account for the longer 6-month sensor. The Calendar Year 2024 Medicare Physician Fee Schedule continues to include the three CPT© Category III codes.
The Highbridge Warrants are exercisable until April 24, 2023. During the year ended December 31, 2021, the warrant holders exercised 1,750,000 warrants.
The Highbridge Warrants are exercisable until April 24, 2030. During the year ended December 31, 2021, the warrant holders exercised 1,750,000 warrants.
In the trial, we observed performance matching that of the 90-day Eversense system available in the United States, with a MARD of 8.5%. This result was achieved with reduced calibration, down to one per day, while also doubling the sensor life to six months.
In the trial, we observed performance matching that of the then current Eversense 90-day product available in the United States, with a MARD of 8.5%. This result was achieved with reduced calibration, down to one per day, while also doubling the sensor life to six months.
These activities, including our ongoing focus to grow covered lives through positive insurance payor policy decisions and continued development of Eversense 365-day product in the United States, will require significant uses of working capital through 2023 and beyond. Management has concluded that based on our current operating plans, existing cash and cash equivalents and cash flows from our future operations will be sufficient to meet our anticipated operating needs through 2024.
These activities, including our ongoing focus to grow covered lives through positive insurance payor policy decisions and continued development of Eversense 365-day product in the United States, will require significant uses of working capital through 2024 and beyond. Management has concluded that based on our current operating plans, existing cash and cash equivalents and cash flows from our future operations will be sufficient to meet our anticipated operating needs through twelve months after issuance of the financial statements.
In December 2021, CMS released its Calendar Year 2022 Medicare Physician Fee Scheduled that update global payments for the device cost and procedure fees. In July 2022, CMS provided temporary G-codes to enable immediate access to Eversense E3 for all eligible Medicare beneficiaries.
In December 2021, CMS released its Calendar Year 2022 Medicare 71 Physician Fee Schedule that updated global payments for the device cost and procedure fees. In July 2022, CMS provided temporary G-codes to enable immediate access to Eversense E3 for all eligible Medicare beneficiaries.
Ascensia began commercializing Eversense E3 in the United States during the second quarter of 2022. The ENHANCE clinical study was initiated as a pivotal study with the purpose of gathering additional clinical data to support an iCGM submission for the Eversense E3 system using the SBA technology.
Ascensia began commercializing Eversense E3 in the United States during the second quarter of 2022. The ENHANCE clinical study was initiated as a pivotal study with the purpose of gathering additional clinical data to support an integrated continuous glucose monitoring (“iCGM”) submission for the Eversense E3 system using the SBA technology.
The distribution rights under the agreement expired January 31, 2021. In June 2022, we affixed the CE mark to the extended life Eversense E3 CGM system, and Ascensia began commercialization in select European markets during the third quarter of 2022, with the commercialization in all European markets in the fourth quarter of 2022. Critical Accounting Estimates The discussion and analysis of our financial condition and results of operations are based upon our consolidated financial statements, which have been prepared in accordance with generally accepted accounting principles in the United States. The preparation of our consolidated financial statements requires us to make estimates, assumptions and judgments that affect the reported amounts of assets, liabilities and equity and disclosure of contingent assets and 71 liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period.
The distribution rights under the agreement expired January 31, 2021. 73 In June 2022, we affixed the CE mark for the Eversense E3 CGM system, and Ascensia began commercialization in certain European markets during the second half of 2022. Critical Accounting Estimates The discussion and analysis of our financial condition and results of operations are based upon our consolidated financial statements, which have been prepared in accordance with generally accepted accounting principles in the United States. The preparation of our consolidated financial statements requires us to make estimates, assumptions and judgments that affect the reported amounts of assets, liabilities and equity and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period.
In the trial, we observed a MARD of 8.5% utilizing two calibration points for Eversense across the 40-400 mg/dL range when compared to YSI blood reference values during the 90-day continuous wear period.
In the trial, we observed a mean absolute relative difference (“MARD”) of 8.5% utilizing two calibration points for Eversense across the 40-400 mg/dL range when compared to YSI blood reference values during the 90-day continuous wear period.
Our implantable CGM (“Eversense”) including, 90-day Eversense, Eversense XL and Eversense E3 continuous glucose monitoring (“CGM”) systems are designed to continually and accurately measure glucose levels in people with diabetes via an under-the-skin sensor, a removable and rechargeable smart transmitter, and a convenient app for real-time diabetes monitoring and management for a period of up to six months in the case of Eversense E3 and Eversense XL, as compared to seven to 14 days for non-implantable CGM systems.
Our implantable CGM (“Eversense”), Eversense E3 continuous glucose monitoring (“CGM”) system version is designed to continually and accurately measure glucose levels in people with diabetes via an under-the-skin sensor, a removable and rechargeable smart transmitter, and a convenient app for real-time diabetes monitoring and management for a period of up to six months as compared to seven to 14 days for non-implantable CGM systems.
The increase was due to investments for next generation technologies including a $7.1 million increase in clinical studies activities, an increase of $3.3 million in personnel related costs due to the expansion of our research and development workforce, an increase of $1.6 million for consulting and other research and development support services and an increase of $0.5 million in other administrative R&D expenses. Selling, general and administrative expenses Selling, general and administrative expenses were $31.6 million for the year ended December 31, 2022, compared to $29.1 million for the year ended December 31, 2021, an increase of $2.5 million.
The increase was primarily due to investments for next generation technologies including a $4.0 million increase in clinical studies activities, an increase of $2.2 million in personnel related costs due to the expansion of our research and development workforce, an increase of 76 $1.4 million for consulting and other support services, an increase of $1.0 million in design and prototype development costs, and an increase of $0.5 million in other administrative R&D expenses. Selling, general and administrative expenses Selling, general and administrative expenses were $29.9 million for the year ended December 31, 2023, compared to $31.6 million for the year ended December 31, 2022, a decrease of $1.7 million.
Unbilled receivables relate to the revenue share variable consideration from the Ascensia commercial agreement. Derivative Financial Instruments In connection with our issuance of the convertible senior subordinated notes due 2023, or the 2023 Notes in January 2018, we bifurcated the embedded conversion option, along with the interest make-whole provision and make-whole fundamental change provision, and recorded the embedded conversion option as a derivative liability in our consolidated balance sheets in accordance with ASC Topic 815, Derivatives and Hedging. In July 2019, we issued $82.0 million in aggregate principal amount of convertible senior subordinated notes due 2025, or the 2025 Notes.
Unbilled receivables relate to the revenue share variable consideration from the Commercialization Agreement. Derivative Financial Instruments In connection with our issuance of the convertible senior subordinated notes due 2023, or the 2023 Notes in January 2018, we bifurcated the embedded conversion option, along with the interest make-whole provision and make-whole fundamental change provision, and recorded the embedded conversion option as a derivative liability in our consolidated balance sheets in accordance with ASC Topic 815, Derivatives and Hedging.
The purchase price of the Purchase Warrant was approximately $0.97 per Purchase Warrant Share. The Purchase Warrant is a “pre-funded” 74 warrant with a nominal exercise price of $0.001 per Purchase Warrant Share.
The Purchase Warrant is a “pre-funded” warrant with a nominal exercise price of $0.001 per Purchase Warrant Share.
There were no warrants exercised for the year ended December 31, 2022. On November 9, 2020, the Company entered into the Equity Line Agreement and issued Energy Capital warrants to purchase up to 10,000,000 shares of Company’s common stock with an exercise price of $0.3951 per share (“Energy Capital Warrants”). The Energy Capital Warrants vested on May 9, 2021.
There were no warrants exercised for the years ended December 31, 2023 or 2022. On November 9, 2020, we entered into the Equity Line Agreement and issued Energy Capital warrants to purchase up to 10,000,000 shares of our common stock with an exercise price of $0.3951 per share (“Energy Capital Warrants”).
In both the United States and our overseas markets, we have entered into a strategic partnerships and distribution agreements that allow third party collaborators with direct sales forces and established distribution systems to market and promote Senseonics CGM systems, including 90-day Eversense, Eversense XL, Eversense E3 and future generation products. United States Development and Commercialization of Eversense In 2016, we completed our PRECISE II pivotal clinical trial in the United States.
In both the United States and our overseas markets, we have entered into strategic partnerships and distribution agreements that allow third party collaborators with direct sales forces and established distribution systems to market and promote Eversense. United States Development and Commercialization of Eversense In 2016, we completed our PRECISE II pivotal clinical trial in the United States.
Our gross profit increased to $2.7 million for the year ended December 31, 2022, compared to ($0.8 million) for the year ended December 31, 2021. Gross profit as a percentage of revenue, or gross margin, was 16.6% and (5.9%) for the years ended December 31, 2022 and 2021, respectively.
Our gross profit increased to $3.1 million for the year ended December 31, 2023, compared to $2.7 million for the year ended December 31, 2022. Gross profit as a percentage of revenue, or gross margin, was 13.8% and 16.6% for the years ended December 31, 2023 and 2022, respectively.
In June 2022, we affixed the CE mark to the Eversense E3 CGM system and Ascensia began commercializing Eversense E3 in Europe in the third quarter of 2022. Our net revenues are derived from sales of the Eversense system which is sold in two separate kits: the disposable Eversense Sensor Pack which includes the sensor, insertion tool, and adhesive patches, and the durable Eversense Smart Transmitter Pack which includes the transmitter and charger. We sell directly to our network of distributors and strategic fulfillment partners, who provide the Eversense system to healthcare providers and patients through a prescribed request and invoice insurance payors for reimbursement.
In February 2022, the 180-day extended life Eversense E3 CGM system was approved by the FDA and Ascensia began commercializing Eversense E3 in the United States in the second quarter of 2022. Our net revenues are derived from sales of the Eversense system which is sold in two separate kits: the disposable Eversense Sensor Pack which includes the sensor, insertion tool, and adhesive patches, and the durable Eversense Smart Transmitter Pack which includes the transmitter and charger. We sell directly to our network of distributors and strategic fulfillment partners, who provide the Eversense system to healthcare providers and patients through a prescribed request and invoice insurance payors for reimbursement.
We affixed the CE mark to the original 90-day Eversense CGM system in June 2016, which marked the first certification for the product to be sold within the European Economic Area (EEA).
We affixed the CE mark to the original 90-day Eversense CGM system in June 2016, which marked the first certification for the product to be sold within the European Economic Area (being the European Union plus Norway, Iceland, and Liechtenstein) (“EEA”).
In connection with the 2025 Notes, we bifurcated the embedded conversion option along with the fundamental change make-whole provision and the cash settled fundamental make-whole shares provision, and recorded the fair value of these embedded features as a derivative liability in our consolidated balance sheets in accordance with Accounting Standards Codification, or ASC, Topic 815, Derivatives and Hedging. 72 In August 2020, we issued $35.0 million in aggregate principal amount of convertible senior secured notes due 2024, or the PHC Notes.
The 2023 Notes were paid in full in January 2023 and the derivative liability was derecognized. In connection with our issuance of the convertible senior subordinated notes due 2025, or the 2025 Notes in July 2019, we bifurcated the embedded conversion option along with the fundamental change make-whole provision and the cash settled fundamental make-whole shares provision, and recorded the fair value of these embedded features as a derivative liability in our consolidated balance sheets in accordance with Accounting Standards Codification, or ASC, Topic 815, Derivatives and Hedging. In August 2020, we issued convertible senior secured notes due 2024, or the PHC Notes.
The increase was primarily the result of a $3.4 million increase in personnel costs, a $1.4 million increase in other general and administrative costs to include recruiting and associated employee overhead, local tax expenses, and legal expenses partially offset by a $2.3 million decrease in sales and marketing costs. Total other income (expense), net Total other income (expense), net, was $210.7 million for the year ended December 31, 2022, compared to ($245.3) million for the year ended December 31, 2021, a change of $456.0 million.
The decrease was primarily the result of a $1.0 million decrease in personnel costs, a $0.8 million decrease in other general and administrative costs to include recruiting and associated employee overhead, local tax expenses, and legal expenses, partially offset by a $0.1 million increase in other selling and marketing costs. Total other income, net Total other income, net, was $15.2 million for the year ended December 31, 2023, compared to $210.7 million for the year ended December 31, 2022, a reduction of $195.5 million.
Jefferies will receive a commission up to 3.0% of the gross proceeds of any common stock sold through Jefferies under the 2021 Sales Agreement.
Jefferies received commissions up to 3.0% of the gross proceeds of any common stock sold through Jefferies under the 2021 Sales Agreement.
In April 2022, the Company repaid the outstanding principal and accrued interest in full. Convertible Notes The following table summarizes our outstanding senior convertible note obligations at December 31, 2022: Aggregate Initial Conversion Conversion Price Convertible Issuance Principal Maturity Rate per $1,000 per Share of Note Date Coupon (in millions) Date Principal Amount Common Stock 2023 Notes January 1, 2018 5.25% $ 15.7 February 1, 2023 294.1176 $ 3.40 2025 Notes July 1, 2019 5.25% $ 51.2 January 15, 2025 757.5758 $ 1.32 PHC Notes August 14, 2020 8.00% $ 35.0 October 31, 2024 1901.7956 $ 0.53 See Note 13 in the accompanying notes to our consolidated financial statements included elsewhere in this Annual Report for further discussion of the 2023 Notes, PHC Notes and 2025 Notes, as well as Note 21 in the accompanying notes to our consolidated financial statements for a discussion of our agreement with PHC, whereby PHC has agreed to exchange the PHC Notes for the Exchange Warrant. Funding Requirements and Outlook Our ability to generate revenue and achieve profitability depends on the successful commercialization and adoption of our Eversense CGM systems by diabetes patients and healthcare providers, along with future product development, regulatory approvals, certifications and post-approval requirements.
In April 2022, we repaid the outstanding principal and accrued interest in full. Convertible Notes The following table summarizes our outstanding senior convertible note obligations at December 31, 2023: Aggregate Initial Conversion Conversion Price Convertible Issuance Principal Maturity Rate per $1,000 per Share of Note Date Coupon (in millions) Date Principal Amount Common Stock 2025 Notes July 1, 2019 5.25% $ 20.4 January 15, 2025 757.5758 $ 1.32 See Note 13 in the accompanying notes to our consolidated financial statements included elsewhere in this Annual Report for further discussion of the 2025 Notes. Funding Requirements and Outlook Our ability to generate revenue and achieve profitability depends on the successful commercialization and adoption of our Eversense CGM systems by diabetes patients and healthcare providers, along with future product development, regulatory approvals, certifications and post-approval requirements.
As of the date of this Annual Report on Form 10-K, we have received $34.4 million in net proceeds from the sale of 15,160,899 shares of our common stock under the 2021 Sales Agreement. In November 2019, we entered into an Open Market Sale Agreement (“2019 Sales Agreement”) with Jefferies, under which we could offer and sell, from time to time at our sole discretion, shares of our common stock having an aggregate offering price of up to $50.0 million through Jefferies as our sales agent in an “at the market” offering.
As of the date of this Annual Report on Form 10-K, no sales have been made under the Equity Distribution Agreement. In November 2021, we entered into an Open Market Sale Agreement (the “2021 Sales Agreement”) with Jefferies LLC (“Jefferies”) under which we could offer and sell, from time to time, at our sole discretion, shares of our common stock having an aggregate offering price of up to $150.0 million through Jefferies as our sales agent in an “at the market” offering.
The Oxford/SVB warrants expire on June 30, 2026, November 22, 2026 and March 29, 2027, respectively. On July 16, 2019, the Company entered into a loan agreement with Solar Capital, Ltd. (“Solar”) and issued Solar warrants to purchase an aggregate of 1,125,000 shares of the Company’s common stock with an exercise price of $1.20 per share (“Solar Warrants”).
The Oxford/SVB warrants expire on June 30, 2026, November 22, 2026 and March 29, 2027, respectively. On April 24, 2020, we entered into a loan agreement with Highbridge and issued the lender warrants to purchase an aggregate of 4,500,000 shares of the Company’s common stock with an exercise price of $0.66 per share (“Highbridge Warrants”).
Our positive income in the current year is substantially the result of fair value gains due to embedded derivatives in our convertible notes. We incurred total net income (loss) of $142.1 million, ($302.5) million, and ($175.2) million for the years ended December 31, 2022, 2021 and 2020, respectively.
We incurred total net (loss) income of ($60.4) million and $142.1 million for the years ended December 31, 2023 and 2022, respectively. Positive net income during 2022 was substantially the result of fair value gains due to embedded derivatives in our convertible notes. As of December 31, 2023, we had an accumulated deficit of $869.3 million.
All shares of Series A Preferred Stock have been converted to common stock as of December 31, 2021. Warrants On June 30, 2016, the Company entered into a loan agreement with Oxford Finance and Silicon Valley Bank (collectively, the “Lenders”) and issued to the Lenders 10-year stock purchase warrants to purchase an aggregate of 116,581, 63,025 and 80,645 shares of common stock at an exercise price of $3.86, $2.38 and $1.86 per share, respectively (“Oxford/SVB Warrants”).
On March 31, 2023 (6:00 am Japan Standard Time on April 1, 2023), the PHC Exchange was consummated, and the Company issued the PHC Exchange Warrant in consideration for the cancellation of the PHC Notes. Warrants In connection with certain of our historical financing transactions, we have issued warrants to investors and providers of debt financing, as described below. On June 30, 2016, we entered into a loan agreement with Oxford Finance and Silicon Valley Bank (collectively, the “Lenders”) and issued to the Lenders 10-year stock purchase warrants to purchase an aggregate of 116,581, 63,025 and 80,645 shares of common stock at an exercise price of $3.86, $2.38 and $1.86 per share, respectively (“Oxford/SVB Warrants”).
We recorded the fair value of the embedded features as a derivative liability in our consolidated balance sheets in accordance with ASC Topic 815, Derivatives and Hedging. The derivative instruments are remeasured at the end of each reporting period with changes in fair value recorded in the consolidated statements of operations and comprehensive loss in other income (expense) as a change in fair value of the derivative liability.
We recorded the fair value of the embedded features as a derivative liability in our consolidated balance sheets in accordance with ASC Topic 815, Derivatives and Hedging.
As of December 31, 2022, we had an accumulated deficit of $808.9 million. To date, we have financed our operations primarily through sales of our equity securities and debt financings.
To date, we have financed our operations primarily through sales of our equity securities and debt financings.
In March 2022, we extended the ongoing ENHANCE clinical study to evaluate the safety and accuracy of the Eversense 365 System for a period of up to one year in the United States. In September 2022, we completed enrollment of the ENHANCE study.
In March 2022, we extended the ongoing ENHANCE clinical study to evaluate the safety and accuracy of the Eversense 365 System for a period of up to one year in the United States. In mid-2023, the data gathered in this trial was used to submit an application to the FDA for the integrated continuous glucose monitoring (“iCGM”) designation.
We engage a third-party valuation specialist to perform the valuation using the binomial option pricing model. Results of Operations Comparison of the Years Ended December 31, 2022 and 2021 The following table sets forth our results of operations for the years ended December 31, 2022 and 2021. December 31, Period-to- 2022 2021 Period Change (in thousands) (in thousands) Revenue, net $ 656 $ 1,394 $ (738) Revenue, net - related parties 15,733 12,281 3,452 Total revenue 16,389 13,675 2,714 Cost of sales 13,663 14,486 (823) Gross profit 2,726 (811) 3,537 Expenses: Research and development expenses 39,719 27,217 12,502 Selling, general and administrative expenses 31,634 29,154 2,480 Operating loss (68,627) (57,182) (11,445) Other (expense) income, net: Interest income 1,824 243 1,581 Gain (Loss) on fair value adjustment of option 43,745 (53,152) 96,897 Gain (Loss) on extinguishment of debt and option (101) 330 (431) Interest expense (18,703) (16,720) (1,983) Gain (Loss) on change in fair value of derivatives 184,221 (174,173) 358,394 Impairment cost (138) (1,647) 1,509 Other expense (102) (173) 71 Total other (expense) income, net 210,746 (245,292) 456,038 Net Income (loss) $ 142,119 $ (302,474) $ 444,593 Components of Results of Operations Total revenue Our total net revenue increased to $16.4 million for the year ended December 31, 2022, compared to $13.7 million for the year ended December 31, 2021, an increase of $2.7 million.
We engage a third-party valuation specialist to perform the valuation using the binomial option pricing model. 75 Results of Operations Comparison of the Years Ended December 31, 2023 and 2022 The following table sets forth our results of operations for the years ended December 31, 2023 and 2022. 2023 2022 Period Change (in thousands) (in thousands) Revenue, net $ 1,655 $ 656 $ 999 Revenue, net - related parties 20,735 15,733 5,002 Total revenue 22,390 16,389 6,001 Cost of sales 19,299 13,663 5,636 Gross profit 3,091 2,726 365 Expenses: Research and development expenses 48,752 39,719 9,033 Selling, general and administrative expenses 29,942 31,634 (1,692) Operating loss (75,603) (68,627) (6,976) Other income (expense), net: Interest income 5,362 1,824 3,538 Gain on fair value adjustment of option — 43,745 (43,745) Exchange related gain, net 14,109 — 14,109 Loss on extinguishment of debt and option — (101) 101 Interest expense (11,110) (18,703) 7,593 Gain on change in fair value of derivatives 6,648 184,221 (177,573) Impairment cost — (138) 138 Other income (expense) 202 (102) 304 Total other income, net 15,211 210,746 (195,535) Net (Loss) Income $ (60,392) $ 142,119 $ (202,511) Components of Results of Operations Total revenue Our total net revenue increased to $22.4 million for the year ended December 31, 2023, compared to $16.4 million for the year ended December 31, 2022, an increase of $6.0 million.
This increase was primarily due to the launch of Eversense E3 in the United States beginning in the second quarter of 2022 and the launch of Eversense E3 outside the United States during the fourth quarter of 2022, partially offset by slightly lower sales outside of the United States for the twelve-month period. 73 Cost of sales and gross profit Our cost of sales decreased to $13.7 million for the year ended December 31, 2022, compared to $14.5 million for the year ended December 31, 2021.
This increase was primarily the result of increased commercial activities driving new patients and awareness and a full year of Eversense E3 revenue in 2023, partially offset by slightly lower sales outside of the United States during 2023. Cost of sales and gross profit Our cost of sales increased to $19.3 million for the year ended December 31, 2023, compared to $13.7 million for the year ended December 31, 2022.
The net proceeds to us from the Registered Direct Offering, after deducting fees and expenses and the estimated offering expenses payable by us, are approximately $46.1 million. On November 9, 2020, we entered into the Equity Line Agreement with Energy Capital, pursuant to which Energy Capital committed to purchase up to an aggregate of $12.0 million of shares of our newly designated Series B convertible Preferred Stock (“Series B Preferred Stock”), at our request from time to time during the 24-month term of the Equity Line Agreement. In addition, beginning on January 1, 2022, since there had been no sales of the Series B Preferred Stock pursuant to the Equity Line Agreement, Energy Capital had the right, at its sole discretion to purchase up to $12.0 million of Series B Preferred Stock under the Equity Line Agreement at a purchase price of $1,000 per share of Series B Preferred Stock initially convertible into common stock, beginning six months after the date of its issuance, at a conversion price of $0.3951 per share.
Beginning on January 1, 2022, since there had been no sales of the Series B Preferred Stock pursuant to the Equity Line Agreement, Energy Capital had the right, at its sole discretion to purchase up to $12.0 million of Series B Preferred Stock under the Equity Line Agreement at a purchase price of $1,000 per share of Series B Preferred Stock initially convertible into common stock, beginning six months after the date of its issuance, at a conversion price of $0.3951 per share.
As of December 31, 2022, the Energy Capital have been exercised in full, on a net basis. As described above, on March 13, 2023, we issued the Purchase Warrant to PHC, which is exercisable for up to 15,425,750 shares of common stock.
In February 2022, the Energy Capital Warrants were exercised in full, on a net basis and Energy Capital received 8,917,535 shares of common stock upon the net exercise of the warrants. On March 13, 2023, we issued to PHC, the Purchase Warrant to purchase 15,425,750 shares of common stock.
As of December 31, 2022, we had cash, cash equivalents and marketable securities of $156.3 million. On March 13, 2023, we issued and sold to PHC in a private placement a warrant (the “Purchase Warrant”) to purchase an aggregate of 15,425,750 shares of common stock (the “Purchase Warrant Shares”).
These transactions are described in greater detail below. On March 13, 2023, we issued and sold to PHC in a private placement a warrant (the “Purchase Warrant”) to purchase an aggregate of 15,425,750 shares of common stock (the “Purchase Warrant Shares”). The purchase price of the Purchase Warrant was approximately $0.97 per Purchase Warrant Share.
Subsequently, we affixed the CE mark to the extended life Eversense XL CGM system in September 2017 which was sold in select markets in Europe and the Middle East. In June 2018, the U.S. Food and Drug Administration, or FDA, approved the 90-day Eversense CGM system and it is currently available throughout the United States.
Subsequently, we affixed the CE mark to the extended life Eversense XL CGM system in September 2017 to be sold in select markets in Europe and the Middle East.
We received aggregate gross proceeds of $15.0 million in the transaction, before deducting private placement expenses payable by us. In November 2021, we entered into an Open Market Sale Agreement (the “2021 Sales Agreement”) with Jefferies LLC (“Jefferies”) under which we could offer and sell, from time to time, at our sole discretion, shares of our common stock having an aggregate offering price of up to $150.0 million through Jefferies as our sales agent in an “at the market” offering.
LLC (“GS”), under which we could offer and sell, from time to time, at our sole discretion, shares of our common stock having an aggregate offering price of up to $106.6 million through GS as our sales agent in an “at the market” offering, which represented the remaining capacity under our then-existing at the market program with Jefferies LLC, as described below.
The increase in gross margin was primarily driven by the transition from the Eversense 90-day product to the 180-day Eversense E3 product, sales channel mix, lower inventory write-offs, reduced warranty and replacement costs, and manufacturing efficiencies. Research and development expenses Research and development expenses were $39.7 million for the year ended December 31, 2022, compared to $27.2 million for the year ended December 31, 2021, an increase of $12.5 million.
The decrease in gross margin was primarily due to sales channel mix and increased contract manufacturing costs driven by raw material prices. Research and development expenses Research and development expenses were $48.8 million for the year ended December 31, 2023, compared to $39.7 million for the year ended December 31, 2022, an increase of $9.1 million.
The change was primarily due to a $358.4 million gain in fair value of derivatives, a $96.9 million gain in the fair value of options primarily driven by the decrease on our stock price, a $1.5 million gain on impairment cost, and a $1.6 million increase in interest income, offset by $2.0 million decrease in interest expense and $0.4 million loss on extinguishment of option. Comparison of the Years Ended December 31, 2021 and 2020 For the discussion of our financial condition and results of operations for the year ended December 31, 2021 compared to the year ended December 31, 2020, please refer to Part II, Item 7, "Management's Discussion and Analysis of Financial Condition and Results of Operations" in our Annual Report on Form 10-K for the year ended December 31, 2021 filed with the SEC on March 1, 2022. Liquidity and Capital Resources Since our inception, we have incurred significant net losses and expect to incur additional losses in the near future.
The change was primarily due to a $177.6 million reduction in gains on the fair value of derivatives primarily driven by debt settlement and the decrease in our stock price, and a $43.7 million reduction in the gain on fair value of options primarily driven by the decrease in our stock price, partially offset by a $3.5 million increase in interest income, a $7.6 million decrease in interest expense, a $14.1 million gain on exchange of debt, and $0.6 million increase in other income (expense) items, net. Liquidity and Capital Resources Since our inception, we have incurred significant net losses and expect to incur additional losses in the near future.
The Shares were offered and sold by us pursuant to an effective shelf registration statement on Form S-3, which was originally filed with the Securities and Exchange Commission on November 27, 2019.
GS will receive a commission up to 3.0% of the gross proceeds of any common stock sold through GS under the Equity Distribution Agreement. The shares will be offered and sold pursuant to an effective shelf registration statement on Form S-3, which was originally filed with the Securities and Exchange Commission on August 10, 2023.
The Purchase Warrant is, and the Exchange Warrant will be, a “pre-funded” warrant with a nominal exercise price of $0.001 per share and no expiration date. Indebtedness PPP Loan On April 22, 2020, the Company received $5.8 million in loan funding from the PPP pursuant to the CARES Act, as amended by the Flexibility Act, and administered by the Small Business Administration (“SBA”).
In December 2023, we met the terms and conditions to draw on Tranche 2 Loan and the loan was funded on January 2, 2024 in an amount of $10.0 million. PPP Loan On April 22, 2020, we received $5.8 million in loan funding from the PPP pursuant to the CARES Act, as amended by the Flexibility Act, and administered by the Small Business Administration (“SBA”).
Product conformity guarantees do not create additional performance obligations and are accounted for as warranty obligations in accordance with guarantee and loss contingency accounting guidance. Our contracts may contain some form of variable consideration such as prompt-pay discounts, tier-volume price discounts and for the Ascensia commercial agreement, revenue share.
Consignment sales represent approximately five percent of our net sales in 2023. Our contracts may contain some form of variable consideration such as prompt-pay discounts, tier-volume price discounts and for the Commercialization Agreement, revenue share.
Eversense XL began commercialization in the EEA in the fourth quarter of 2017. All such commercialization and marketing activities remain subject to applicable government approvals or certification. In May 2016, we entered into a distribution agreement with Roche.
All such commercialization and marketing activities remain subject to applicable government approvals. We previously held a distribution agreement with Roche and granted Roche the exclusive right to market, sell and distribute Eversense in certain territories within EMEA and other countries outside of the United States.
In 2022, we have been working with payors to transition their policies to Eversense E3 and have confirmed immediate coverage policy transition from select payors. We are in the early commercialization stages of the Eversense brand and are focused on driving awareness of our CGM system amongst intensively managed patients and their healthcare providers.
We expect that this data will support an FDA submission to be made in the coming weeks for a new product with a target 365-day duration and once per week calibration. We are in the early commercialization stages of the Eversense brand and are focused on driving awareness of our CGM system amongst intensively managed patients and their healthcare providers.
In February 2022, the extended life Eversense E3 CGM system was approved by the FDA and Ascensia Diabetes Care Holdings AG (“Ascensia”) began commercializing Eversense E3 in the United States in the second quarter of 2022.
In June 2022, we affixed the CE mark to the Eversense E3 CGM system and Ascensia Diabetes Care Holdings AG (“Ascensia”) began commercialization in select markets in Europe during the third quarter of 2022. In June 2018, the U.S. Food and Drug Administration (“FDA”), approved the 90-day Eversense CGM system for distribution throughout the United States.
Additionally, on March 13, 2023, we entered into another agreement with PHC, whereby PHC agreed to exchange the PHC Notes for the Exchange Warrant, which will be exercisable for up to 68,525,311 shares of common stock, with such exchange closing on April 1, 2023, subject to the satisfaction of 76 customary closing conditions for a transaction of this type.
All or any part of the Purchase Warrant shall is exercisable by the holder at any time and from time to time. In addition, on March 13, 2023, we entered into an exchange agreement with PHC, pursuant to which PHC agreed to exchange $35.0 million aggregate principal amount of the PHC Notes, including all accrued and unpaid interest thereon, for a warrant (the “PHC Exchange Warrant”) to purchase up to 68,525,311 shares of common stock.