Biggest changeIn February 2022, we filed a sales agreement prospectus under a registration statement on Form S-3 (File No. 333-262981) covering the sale of up to $50.0 million of our common stock through Cantor Fitzgerald under the CF Sales Agreement. 48 During the year ended December 31 , 2022, we used $ 80.7 million of cash for our operating activities, which primarily consisted of $ 75.1 million of selling, general and administrative expenses, $ 58.5 million of cost of goods sold, $ 23.8 million of costs for research and development , $ 8.9 million of cash paid for interest on notes and $9.6 million of cash paid for interest on the financing liability , partially offset by $ 108.3 million of revenue.
Biggest changeIn February 2022, we filed a sales agreement prospectus under a registration statement on Form S-3 (File No. 333-262981) covering the sale of up to $50.0 million of our common stock through Cantor Fitzgerald under the CF Sales Agreement, of which $23.3 million remained available as of December 31, 2023.
Cash provided from investing activities of $4.9 million for the year ended December 31, 2022 was primarily due to the maturity of $107.3 million of debt securities, partially offset by the up-front consideration of $15.3 million for certain assets and assumed liabilities related to V-Go, $5.0 million purchase of available-for-sale securities, the purchase of $74.5 million of debt securities and $7.6 million purchase of property and equipment.
Cash provided by investing activities of $4.9 million for the year ended December 31, 2022 was primarily due to the maturity of $107.3 million of debt securities, partially offset by the up-front consideration of $15.3 million for certain assets and assumed liabilities related to V-Go, $5.0 million purchase of available-for-sale securities, the purchase of $74.5 million of debt securities and $7.6 million purchase of property and equipment.
Our analysis also contemplates application of the constraint in accordance with the guidance, under which we determined a material reversal of revenue would not occur in a future period for the estimates of gross-to-net adjustments as of December 31, 2022 and, therefore, the transaction price was not reduced further during the year ended December 31, 2022.
Our analysis also contemplates application of the constraint in accordance with the guidance, under which we determined a material reversal of revenue would not occur in a future period for the estimates of gross-to-net adjustments as of December 31, 2023 and, therefore, the transaction price was not reduced further during the year ended December 31, 2023.
Where appropriate, these estimates take into consideration a range of possible outcomes, which are probability-weighted in accordance with the expected value method in Accounting Standards Codification (“ ASC”) Topic 606, Revenue from Contracts with Customers (“ASC 606”) for relevant factors such as current contractual and statutory requirements, specific known market events and trends, industry data, and forecasted customer buying and payment patterns.
Where appropriate, these estimates take into consideration a range of possible outcomes, which are probability-weighted in accordance with the expected value method in Accounting Standards Codification (“ASC”) Topic 606, Revenue from Contracts with Customers (“ASC 606”) for relevant factors such as current contractual and statutory requirements, specific known market events and trends, industry data, and forecasted customer buying and payment patterns.
A discussion of changes in our results of operations during the year ended December 31, 2021 compared to the year ended December 31, 2020 has been omitted from this Annual Report on Form 10-K but may be found in “Item 7.
A discussion of changes in our results of operations during the year ended December 31, 2022 compared to the year ended December 31, 2021 has been omitted from this Annual Report on Form 10-K but may be found in “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 February 24, 2022, which discussion is incorporated herein by reference and which is available free of charge on the SEC’s website at www.sec.gov.
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, 2022, filed with the SEC on February 23, 2023, which discussion is incorporated herein by reference and which is available free of charge on the SEC’s website at www.sec.gov.
If there is a 10% difference between the estimates for accruals and the actual liability in the reserves for variable consideration, the impact to our revenue for commercial product sales would be $2.0 million or a 4.1% change in the gross-to-net adjustment percentage for the year ended December 31, 2022.
If there is a 10% difference between the estimates for accruals and the actual liability in the reserves for variable consideration, the impact to our revenue for commercial product sales would be $2.0 million or a 1.5% change in the gross-to-net adjustment percentage for the year ended December 31, 2023.
Recent Accounting Pronouncements See Note 2 — Summary of Significant Accounting Policies of the Notes to Consolidated Financial Statements included in Part II, Item 8 — Financial Statements and Supplementary Data for information regarding accounting standards we adopted in 2022 and other new accounting standards that have been issued by the FASB but are not effective until after December 31, 2022.
Recent Accounting Pronouncements See Note 2 — Summary of Significant Accounting Policies of the Notes to Consolidated Financial Statements included in Part II, Item 8 — Financial Statements and Supplementary Data for information regarding new accounting standards that have been issued by the FASB but are not effective until after December 31, 2023.
(“Cantor Fitzgerald”), as sales agent, pursuant to which we may offer and sell, from time to time, through Cantor Fitzgerald, shares of our common stock. Under the Sales Agreement, Cantor Fitzgerald may sell shares by any method deemed to be an “ at-the-market offering ” as defined in Rule 415 under the Securities Act of 1933, as amended.
(“Cantor Fitzgerald”), as sales agent, pursuant to which we may offer and sell, from time to time, through Cantor Fitzgerald, shares of our common stock. Under the Sales Agreement, Cantor Fitzgerald may sell shares by any method deemed to be an “at-the-market offering” as defined in Rule 415 under the Securities Act of 1933, as amended.
If there is a 10% difference in the grant date fair value of the Market RSUs, the impact to our stock-based compensation expense would be $0.6 million for the year ended December 31, 2022.
If there is a 10% difference in the grant date fair value of the Market RSUs, the impact to our stock-based compensation expense would be $0.8 million for the year ended December 31, 2023.
To date, we have funded our operations primarily through the sale of our equity and convertible debt securities, from the receipt of upfront and milestone payments from collaborations, from borrowings, from sales of Afrezza and V-Go, from royalties and manufacturing revenue from UT as well as from proceeds of the sale-leaseback of our manufacturing facility in Danbury, CT.
To date, we have funded our operations primarily through the sale of our equity and convertible debt securities, from the receipt of upfront and milestone payments from collaborations, from borrowings, from sales of Afrezza and V-Go, from royalties and manufacturing revenue from UT, from proceeds of the sale-leaseback of our manufacturing facility in Danbury, CT and from the sale of a portion of future royalties that we receive from UT.
We believe our resources will be sufficient to fund our operations for the next twelve months from the date of issuance of our consolidated financial statements included in Item 8 – Financial Statements.
We believe our resources will be sufficient to fund our operations for the next twelve months from the date of issuance of our consolidated financial statements included in Part II, Item 8 – Financial Statements and Supplementary Data.
Cash provided by financing activities of $21.4 million for the year ended December 31, 2022 was primarily due to net proceeds from at-the-market offering of $19.8 million, partially offset by the milestone payment of $1.1 million.
Cash provided by financing activities of $21.4 million for the year ended December 31, 2022 was primarily due to net proceeds from at-the-market offering of $19.4 million and proceeds from market price stock purchase plan and employee stock purchase plan of $2.8 million, partially offset by the milestone payment of $1.1 million.
Interest expense on financing liability was $9.8 million for the year ended December 31, 2022 and represented interest incurred on the sale lease-back transaction for our manufacturing facility in Danbury, CT which was entered into in the fourth quarter of 2021. Interest expense on notes for the year ended December 31, 2022 was comparable to the prior year.
Interest expense on financing liability was $9.8 million for each of the years ended December 31, 2023 and 2022, and represented interest incurred on the sale lease-back transaction for our manufacturing facility in Danbury, CT, which was entered into in the fourth quarter of 2021.
As a result, there is a high risk that the funds we invest in research programs will not generate sufficient financial returns. Products may appear promising in development but fail to reach market within the expected or optimal timeframe, or at all.
There is a high rate of failure inherent in the R&D process for new drugs. As a result, there is a high risk that the funds we invest in research programs will not generate sufficient financial returns. Products may appear promising in development but fail to reach market within the expected or optimal timeframe, or at all.
Other expense or income for the years ended December 31, 2022 and 2021 consisted primarily of the loss associated with a foreign currency hedging transaction which was entered into to mitigate our exposure to foreign currency exchange risks associated with our insulin purchase obligation under the Insulin Supply Agreement with Amphastar.
Other expense for the year ended December 31, 2022 consisted of a loss associated with a foreign currency hedging transaction that was entered into to mitigate our exposure to foreign currency exchange risks associated with our insulin purchase obligation under the Insulin Supply Agreement with Amphastar.
The increase reflects a combination of higher price (including a more favorable gross-to-net adjustment), higher product demand and a favorable cartridge mix. The gross-to-net adjustment was 39% of gross revenue, or $27.8 million, for the year ended December 31, 2022, compared to 39% of gross revenue or $24.9 million, for the prior year.
The increase reflects a combination of higher product demand and higher price (including a more favorable gross-to-net adjustment). The gross-to-net adjustment was 38% of gross revenue, or $33.0 million, for the year ended December 31, 2023 compared to 39% of gross revenue, or $27.8 million, for the prior year.
If we fail to repurchase the Mann Group promissory notes, we will be in default under the applicable instrument for such indebtedness, and may also suffer an event of default under the terms of other borrowing arrangements that we may enter into from time to time.
If we fail to repay, repurchase or redeem our outstanding notes when required, we will be in default under the applicable instrument for such indebtedness, and may also suffer an event of default under the terms of other borrowing arrangements that we may enter into from time to time.
Gain on foreign currency translation was $4.8 million for the year ended December 31, 2022 compared to $6.6 million for the prior year. Under the Insulin Supply Agreement with Amphastar, payment obligations are denominated in Euros.
Loss on foreign currency transaction was $1.9 million for the year ended December 31, 2023 compared to a gain of $4.8 million for the prior year. Under the Insulin Supply Agreement with Amphastar, payment obligations are denominated in Euros.
See Note 10 — Borrowings . Loss on available-for-sale securities for the year ended December 31, 2022 was $0.9 million as a result of the change in the fair value of the investment that related to credit risk.
Loss on available-for-sale securities for the years ended December 31, 2023 and 2022 was $0.2 million and $0.9 million, respectively, as a result of the change in the fair value of the investment that related to credit risk.
Other significant risks also include the risk that our products may only achieve a limited degree of commercial success and the risks inherent in drug development, clinical trials and the regulatory approval process for our product candidates, which in some cases depends upon the efforts of our partners.
Other significant risks also include the risk that our products may only achieve a limited degree of commercial success and the risks inherent in drug development, clinical trials and the regulatory approval process for our product candidates, which in some cases depends upon the efforts of our partners. 50 As of December 31, 2023, we had an accumulated deficit of $3.2 billion and a stockholders’ deficit of $246.2 million.
The grant date fair value for the Market RSUs was $6.10 per unit for the Market RSUs granted during the year ended December 31, 2022, compared to $9.30 and $3.77 per unit for the Market RSUs granted during the years ended December 31, 2021 and 2020, respectively.
The grant date fair value for the Market RSUs was $9.40 per unit for the Market RSUs granted during the year ended December 31, 2023, compared to $6.10 per unit for the Market RSUs granted during the year ended December 31, 2022.
We are required to record the foreign currency translation impact of the U.S. dollar to Euro exchange rate associated with the recognized loss on purchase commitments. The decrease in year-over-year gain was due to the translation of Euro to U.S. dollar exchange rates.
We are required to record the foreign currency transaction impact of the U.S. dollar to Euro exchange rate associated with the recognized loss on purchase commitments.
We believe we will be able to meet our liquidity needs based on our cash, cash equivalents and investments on hand, sales of Afrezza and V-Go, royalties and manufacturing revenue from the production and sale of Tyvaso DPI.
Future Liquidity Needs We believe we will be able to meet our near-term liquidity needs based on our cash, cash equivalents and investments on hand, sales of Afrezza and V-Go, and royalties and manufacturing revenue from the production and sale of Tyvaso DPI as well as through debt or equity financing, if necessary, for our long-term liquidity needs.
General and administrative expenses increased by $5.8 million, or 18%, for the year ended December 31, 2022, compared to the prior year. This increase was primarily attributable to higher stock-based compensation, increased headcount, and higher professional and consulting fees.
General and administrative expenses increased by $4.8 million, or 13%, for the year ended December 31, 2023 compared to the prior year. This increase was primarily attributable to increased personnel costs, including stock-based compensation and headcount.
During the year ended December 31, 2021, we used $61.7 million of cash for our operating activities, which primarily consisted of $65.8 million of selling, general and administrative expenses, $35.5 million of cost of goods sold and cost of revenue, $11.7 million of costs for research and development and $6.5 million of cash paid for interest, partially offset by $47.6 million of revenue.
During the year ended December 31, 2022, we used $80.7 million of cash for our operating activities, which primarily consisted of $75.1 million of selling, general and administrative expenses, $58.5 million of cost of goods sold, $23.8 million of costs for research and 57 development, $8.9 million of cash paid for interest on notes and $9.6 million of cash paid for interest on the financing liability, partially offset by $108.3 million of revenue.
Future Liquidity Needs We are not currently profitable and have rarely generated positive net cash flow from operations. In addition, we expect to continue to incur expenditures for the foreseeable future in support of our manufacturing operations, sales and marketing costs for our products and development costs for other product candidates in our pipeline.
In addition, we expect to continue to incur expenditures for the foreseeable future in support of our manufacturing operations, sales and marketing costs for our products and development costs for other product candidates in our pipeline.
Reserves for Variable Consideration — Revenues from product sales are recorded at the net sales price (transaction price), which includes estimates of variable consideration for which reserves are established.
Product revenues are recorded net of applicable reserves including discounts, allowances, rebates, returns and other incentives. See Reserves for Variable Consideration below. Reserves for Variable Consideration — Revenues from product sales are recorded at the net sales price (transaction price), which includes estimates of variable consideration for which reserves are established.
Amounts that we expect will not be recognized within the next 12 months are classified as long-term deferred revenue. 44 If there is a 10% difference in the estimates used to determine the transaction price for the CSA entered into in December 202 2 with UT, the related allocation of the transaction price between performance obligations, the difference between the estimates for accruals and the actual liability for deferred revenue and revenue recognized for collaborations and services would be $0. 4 million for the year ended December 31, 202 2 .
If there is a 10% difference in the estimates used to determine the transaction price for the CSA entered into in December 2022 with UT and the related allocation of the transaction price between performance obligations, the difference between the estimates for accruals and the actual liability for deferred revenue and revenue recognized for collaborations and services would be $1.8 million for the year ended December 31, 2023.
As of December 31, 2022, we had capital resources of $69.8 million in cash and cash equivalents, $101.0 million in short-term investments and $2.0 million in long-term investments, and total principal amount of outstanding borrowings of $278.8 million.
As of December 31, 2023, we had capital resources of $238.5 million in cash and cash equivalents, $56.6 million in short-term investments and $7.2 million in long-term investments, and total principal amount of outstanding borrowings of $272.1 million.
In addition to distribution agreements with Customers, we enter into arrangements with payers that provide for government mandated and/or privately negotiated rebates, chargebacks, and discounts with respect to the purchase of our products. 43 We recognize revenue on product sales when the Customer obtains control of our product, which occurs at delivery for wholesale distributors and generally at delivery for specialty pharmacies.
In addition to distribution agreements with Customers, we enter into arrangements with payers that provide for government mandated and/or privately negotiated rebates, chargebacks, and discounts with respect to the purchase of our products.
(2) $40.0 million principal amount under the MidCap credit facility, bearing interest at an annual rate equal to one-month SOFR plus 6.25% (cap of 8.25%), subject to a one-month SOFR floor of 1.00%, payable in equal monthly installments beginning in September 2023 through maturity in August 2025.
(2) $33.3 million principal amount under the MidCap credit facility, bearing interest at an annual rate equal to one-month Secured Overnight Financing Rate (“SOFR") plus 6.25% (capped at a total of 8.25%), subject to a one-month SOFR floor of 1.00%. Interest is payable monthly in arrears.
In addition to the above, we also expect to have material cash requirements relating to paying our employees and consultants, professional services fees, marketing expenses, manufacturing expenditures, and clinical trial expenses.
See Note 9 – Accrued Expenses and Other Current Liabilities , Note 10 – Borrowings and Note 16– Commitments and Contingencies for further information related to the Milestone Rights. In addition to the above, we also expect to have material cash requirements relating to paying our employees and consultants, professional services fees, marketing expenses, manufacturing expenditures, and clinical trial expenses.
Years ended December 31, 2022 and 2021 Revenues The following table provides a comparison of the revenue categories for the years ended December 31, 2022 and 2021 (dollars in thousands): Year Ended December 31, 2022 2021 $ Change % Change Net revenue — commercial product sales: Gross revenue from product sales $ 97,048 $ 64,023 $ 33,025 52 % Wholesaler distribution fees, rebates and chargebacks, product returns and other discounts (40,801 ) (24,855 ) $ 15,946 64 % Net revenue — commercial product sales 56,247 39,168 $ 17,079 44 % Gross-to-net revenue adjustment percentage (42 %) (39 %) Revenue — collaborations and services 27,924 36,274 $ (8,350 ) (23 %) Royalties — collaborations 15,599 — $ 15,599 * Total revenues $ 99,770 $ 75,442 $ 24,328 32 % _________________________ * Not meaningful Afrezza — Gross revenue from sales of Afrezza increased by $7.1 million, or 11%, for the year ended December 31, 2022 compared to the prior year.
Years ended December 31, 2023 and 2022 Revenues The following table provides a comparison of the revenue categories for the years ended December 31, 2023 and 2022 (dollars in thousands): Year Ended December 31, 2023 2022 $ Change % Change Net revenue – commercial product sales: Gross revenue from product sales $ 130,461 $ 97,048 $ 33,413 34 % Less: Wholesaler distribution fees, rebates and chargebacks, product returns and other discounts 56,432 40,801 $ 15,631 38 % Net revenue – commercial product sales $ 74,029 $ 56,247 $ 17,782 32 % Gross-to-net revenue adjustment percentage 43 % 42 % Revenue – collaborations and services 52,954 27,924 $ 25,030 90 % Royalties – collaborations 71,979 15,599 $ 56,380 361 % Total revenues $ 198,962 $ 99,770 $ 99,192 99 % Afrezza — Gross revenue from sales of Afrezza increased by $16.8 million, or 24%, for the year ended December 31, 2023 compared to the prior year.
As of December 31, 2022, we had an accumulated deficit of $3.2 billion and a stockholders’ deficit of $250.5 million. We had net loss of $87.4 million, $80.9 million and $57.2 million in the years ended December 31, 2022, 2021 and 2020, respectively.
We had net loss of $11.9 million, $87.4 million and $80.9 million in the years ended December 31, 2023, 2022 and 2021, respectively.
Other Income (Expense) The following table provides a comparison of the other income (expense) categories for the years ended December 31, 2022 and 2021 (dollars in thousands): Year Ended December 31, 2022 2021 $ Change % Change Interest income $ 2,513 $ 112 $ 2,401 * Interest expense on financing liability (9,758 ) (1,373 ) $ 8,385 * Interest expense on notes (15,011 ) (15,204 ) $ (193 ) (1 %) Loss on available-for-sale securities (932 ) — $ (932 ) * Loss on extinguishment of debt — (17,200 ) $ (17,200 ) (100 %) Other expense (102 ) (239 ) $ (137 ) (57 %) Total other expense $ (23,290 ) $ (33,904 ) $ (10,614 ) (31 %) _________________________ * Not meaningful Interest income, consisting of interest on investments net of amortization, increased by $2.4 million compared to the prior year primarily due to higher yields on our marketable securities and money market funds.
The year-over-year change was due to the conversion of Euro to U.S. dollar exchange rates. 54 Other Income (Expense) The following table provides a comparison of the other income (expense) categories for the years ended December 31, 2023 and 2022 (dollars in thousands): Year Ended December 31, 2023 2022 $ Change % Change Interest income $ 6,154 $ 2,513 $ 3,641 145 % Interest expense on financing liability (9,825 ) (9,758 ) $ 67 1 % Interest expense (15,151 ) (15,011 ) $ 140 1 % Interest expense on liability for sale of future royalties (185 ) — $ 185 * Loss on available-for-sale securities (170 ) (932 ) $ (762 ) (82 %) Other income (expense) 122 (102 ) $ (224 ) (220 %) Total other expense $ (19,055 ) $ (23,290 ) $ (4,235 ) (18 %) _________________________ * Not meaningful Interest income, consisting of interest on investments net of amortization, increased by $3.6 million compared to the prior year primarily due to higher yields on our marketable securities and money market funds.
Cash used in investing activities of $151.5 million for the year ended December 31, 2021 was primarily due to the purchase of debt securities of $196.1 million, partially offset by proceeds received from sales of debt securities of $59.1 million.
Cash used in investing activities of $2.0 million for the year ended December 31, 2023 was primarily due to the maturity of $119.2 million of debt securities, partially offset by the purchase of $79.1 million of debt securities and $42.4 million purchase of property and equipment.
The gross-to-net adjustment of 50.2% of gross revenue was mainly attributable to commercial and government rebates and product distribution fees. Collaborations and Services — Net revenue from collaborations and services decreased by $8.4 million, or 23%, for the year ended December 31, 2022 compared to the prior year.
The gross-to-net adjustment was 55% of gross revenue, or $23.4 million, for the year ended December 31, 2023 compared to 50% of gross revenue, or $13.0 million, for the prior year. The increase in gross-to-net percentage was mainly attributable to increased commercial and government rebates (as a percentage of gross sales).
Cost of goods sold decreased by $8.2 million, or 48%, for the year ended December 31, 2022 compared to the prior year.
Selling expenses decreased by $2.0 million, or 4%, for the year ended December 31, 2023, compared to the prior year.
Our primary uses of cash include the development of our product pipeline, the manufacturing and marketing of Afrezza and V-Go, manufacturing Tyvaso DPI, the funding of general and administrative expenses, and interest expense on our financing liability and debt. 47 To date, we have funded our operations primarily through the sale of equity and convertible debt securities, from the receipt of upfront and milestone payments from collaborations, from borrowings, from sales of Afrezza and V-Go, from royalties and manufacturing revenue from UT as well as from proceeds from the s ale- l easeback transaction.
To date, we have funded our operations primarily through the sale of equity and convertible debt securities, from the receipt of upfront and milestone payments from collaborations, from borrowings, from sales of Afrezza and V-Go, from royalties and manufacturing revenue from UT as well as from proceeds from the sale of certain assets and the sale of a portion of our future royalties that we receive from UT.
As a result, net revenue from sales of Afrezza increased by $4.1 million, or 11%, for the year ended December 31, 2022 compared to the prior year. 45 V-Go — The acquisition of V-Go on May 31, 2022 resulted in an increase in gross revenue from commercial product sales of $25.9 million and net revenue of $12.9 million for the year ended December 31, 2022.
V-Go — Gross revenue from sales of V-Go increased by $16.6 million, or 64%, for the year ended December 31, 2023 compared to the prior year. The increase was a result of a full year of sales in 2023 compared to seven months in the prior year as V-Go was acquired in May 2022.
Interest expense is calculated using an incremental borrowing rate of 9%. (5) The July 2014 Insulin Supply Agreement with Amphastar to manufacture and supply us certain quantities of recombinant human insulin for use in Afrezza was amended in May 2021 and expires on December 31, 2027.
(5) The July 2014 Insulin Supply Agreement with Amphastar to manufacture and supply us certain quantities of recombinant human insulin for use in Afrezza was amended in May 2021 and again on December 22, 2023 to purchase certain minimum quantities over a term that currently extends through at least December 31, 2034.
The following table presents our material cash requirements as of December 31, 2022 associated with contractual commitments for future periods (in thousands): 2023 2024 - 2025 2026 - 2027 Thereafter Total Senior convertible notes (1) $ 5,750 $ 11,500 $ 232,875 $ — $ 250,125 MidCap credit facility (2) 9,896 35,541 — — 45,437 Mann Group convertible note (3) — 9,233 — — 9,233 Financing liability (4) 9,774 20,287 21,382 188,453 239,896 Insulin purchase agreement (5) 9,390 32,243 30,674 — 72,307 Total material cash requirements $ 34,810 $ 108,804 $ 284,931 $ 188,453 $ 616,998 _________________________ (1) $230.0 million aggregate principal amount of Senior convertible notes bearing interest at 2.50% payable semi-annually in arrears on March 1 and September 1 of each year, beginning on September 1, 2021 and maturing on March 1, 2026, unless earlier converted, redeemed or repurchased.
The following table presents our material cash requirements as of December 31, 2023 associated with contractual commitments for future periods (in thousands): 2024 2025 - 2026 2027 - 2028 Thereafter Total Senior convertible notes (1) $ 5,750 $ 238,625 $ — $ — $ 244,375 MidCap credit facility (2) 21,885 13,656 — — 35,541 Mann Group convertible note (3) 223 9,057 — — 9,280 Financing liability (4) 10,018 20,802 22,023 177,278 230,121 Insulin purchase agreement (5) 3,209 4,682 13,251 44,611 65,753 Insulin purchase capacity fees (5) — 3,865 2,208 4,417 10,490 Total material cash requirements $ 41,085 $ 290,687 $ 37,482 $ 226,306 $ 595,560 56 _________________________ (1) $230.0 million aggregate principal amount of Senior convertible notes bearing interest at 2.50% payable semi-annually in arrears on March 1 and September 1 of each year, beginning on September 1, 2021 and maturing on March 1, 2026, unless earlier converted, redeemed or repurchased by us.
We also receive a margin on supplies of Tyvaso DPI that we manufacture for UT. Our business is subject to significant risks, including but not limited to our ability to manufacture sufficient quantities of our products and Tyvaso DPI.
We plan to initiate a Phase 1 clinical study of MNKD-201 in the second quarter of 2024. Our business is subject to significant risks, including but not limited to our ability to manufacture sufficient quantities of our products and Tyvaso DPI.
Commercial product gross profit The following table provides a comparison of the commercial product gross profit categories for the years ended December 31, 2022 and 2021 (dollars in thousands): Year Ended December 31, 2022 2021 $ Change % Change Commercial product gross profit: Net revenue — commercial product sales $ 56,247 $ 39,168 $ 17,079 44 % Less cost of goods sold (16,003 ) (16,833 ) $ (830 ) (5 %) Commercial product gross profit: $ 40,244 $ 22,335 $ 17,909 80 % Gross margin 72 % 57 % Afrezza — Commercial product gross profit for Afrezza increased by $12.3 million, or 55%, for the year ended December 31, 2022, compared to the prior year.
See Note 11 – Collaboration, Licensing and Other Arrangements in the consolidated financial statements included in Part II, Item 8 – Financial Statements and Supplementary Data. 53 Commercial product gross profit The following table provides a comparison of the commercial product gross profit categories for the years ended December 31, 2023 and 2022 (dollars in thousands): Year Ended December 31, 2023 2022 $ Change % Change Commercial product gross profit: Net revenue – commercial product sales $ 74,029 $ 56,247 $ 17,782 32 % Less: Cost of goods sold 20,863 16,003 $ 4,860 30 % Commercial product gross profit: $ 53,166 $ 40,244 $ 12,922 32 % Gross margin 72 % 72 % Commercial product gross profit increased by $12.9 million, or 32%, for the year ended December 31, 2023 compared to the prior year.
Interest was paid-in-kind from August 2019 until the end of 2020, after which we have the option to pay interest in-kind or in shares. (4) On November 8, 2021, we sold a portion of our manufacturing facility located in Danbury, CT to an affiliate of Creative Manufacturing Properties (the “Purchaser”) for a sales price of $102.3 million.
On November 8, 2021, we sold a portion of our manufacturing facility located in Danbury, CT to an affiliate of Creative Manufacturing Properties (the “Purchaser”) for a sales price of $102.3 million. We leased the property from the Purchaser for an initial term of 20 years, with four renewal options of five years each.
Expenses The following table provides a comparison of the expense categories for the years ended December 31, 2022 and 2021 (dollars in thousands): Year Ended December 31, 2022 2021 $ Change % Change Expenses: Cost of goods sold $ 16,003 $ 16,833 $ (830 ) (5 %) Cost of revenue — collaborations and services 41,494 22,024 $ 19,470 88 % Research and development 19,721 12,312 $ 7,409 60 % Selling 53,753 45,528 $ 8,225 18 % General and administrative 37,720 31,889 $ 5,831 18 % Asset impairment — 106 $ (106 ) (100 %) Gain on foreign currency translation (4,811 ) (6,567 ) $ (1,756 ) (27 %) Loss on purchase commitments — 339 $ (339 ) (100 %) Total expenses $ 163,880 $ 122,464 $ 41,416 34 % Cost of revenue — collaborations and services increased by $19.5 million, or 88%, for the year ended December 31, 2022 compared to the prior year.
Expenses The following table provides a comparison of the expense categories for the years ended December 31, 2023 and 2022 (dollars in thousands): Year Ended December 31, 2023 2022 $ Change % Change Expenses: Cost of goods sold $ 20,863 $ 16,003 $ 4,860 30 % Cost of revenue — collaborations and services 41,908 41,494 $ 414 1 % Research and development 31,283 19,721 $ 11,562 59 % Selling 51,776 53,753 $ (1,977 ) (4 %) General and administrative 42,538 37,720 $ 4,818 13 % Loss (gain) on foreign currency transaction 1,916 (4,811 ) $ (6,727 ) * Total expenses $ 190,284 $ 163,880 $ 26,404 16 % _________________________ * Not meaningful Cost of revenue — collaborations and services increased by $0.4 million, or 1%, for the year ended December 31, 2023 compared to the prior year.
Our reserves for variable consideration are reflected in our gross-to-net adjustments which were 42% of gross revenue, or $40.8 million, for the year ended December 31, 2022, compared to 39% of gross revenue, or $24.9 million, for the year ended December 31, 2021.
Significant judgment is required in estimating gross-to-net adjustments, historical experience, payer channel mix unbilled claims, claim submission time lags and inventory levels in the distribution channel. 51 Our reserves for variable consideration are reflected in our gross-to-net adjustments which were 43% of gross product revenue, or $56.4 million, for the year ended December 31, 2023, compared to 42% of gross product revenue, or $40.8 million, for the year ended December 31, 2022.
The gross-to-net percentage remained consistent over the prior year and was primarily impacted by an increase in anticipated product returns, offset by a decrease in co-pay assistance and wholesaler distribution fees (as a percentage of gross sales) due to an increased mix of specialty and retail pharmacy sales.
The decrease in the gross-to-net percentage was primarily impacted by decreases in co-pay assistance and anticipated product returns partially offset by an increase in government rebates (as a percentage of gross sales). As a result, net revenue from sales of Afrezza increased by $11.6 million, or 27%, for the year ended December 31, 2023 compared to the prior year.
The increase was attributable to an increase in manufacturing activities for Tyvaso DPI product. 46 Research and development expenses increased by $ 7.4 million, or 60 %, for the year ended December 31 , 2022 compared to the prior year.
Research and development expenses increased by $11.6 million, or 59%, for the year ended December 31, 2023 compared to the prior year.
The Milestone Rights provided the Original Milestone Purchasers certain rights to receive payments of up to $90.0 million upon the occurrence of specified strategic and sales milestones, $60.0 million of which remains payable to Barings upon achievement of such milestones. See Note 16– Commitments and Contingencies and Note 10 – Borrowings for further information related to the Milestone Rights.
The Milestone Rights provide the Milestone Purchasers certain rights to receive payments of up to $90.0 million upon the occurrence of specified strategic and sales milestones, $55.0 million of which remain payable as of December 31, 2023.
Gross margin for the year ended December 31 2022 increased to 80% compared to 57% for the prior year. The increase in gross profit and gross margin was attributable to an increase in Afrezza sales as well as a decrease in cost of goods sold.
The increase in gross profit was primarily attributable to an increase in Afrezza net revenue and gross margin. The acquisition of V-Go in May 2022 contributed to the increase in commercial product sales and related cost of goods sold. As a result, gross margin remained consistent with the prior year at 72%.
Revenue associated with the CSA was deferred until we began manufacturing and subsequently selling Tyvaso DPI in the second quarter of 2022. During the year ended December 31, 2022, we recognized $24.8 million of revenue under the CSA. We also recognized royalty revenue from our collaboration with UT of $15.6 million during the year ended December 31, 2022.
The increase in revenue was primarily attributable to manufacturing revenues being deferred in the prior year period until we began commercial manufacturing in May 2022 and an increase in product sold to UT. During the year ended December 31, 2023, we recognized $52.0 million of revenue under the CSA compared to $24.8 million in the prior year.
The increase was primarily attributable to a pilot promotional effort aimed at primary care physicians that began in the fourth quarter of 2021 and ended in the third quarter of 2022, elimination of a co-promotion for third party product (which permitted some expenses associated with the sales force to be recognized as cost of revenue — collaborations and services in the same period of 2021), V-Go promotional efforts after the acquisition in the second quarter of 2022, partially offset by the net favorable impact of personnel-related costs due to Afrezza sales force restructuring.
The decrease was primarily attributable to the termination of an Afrezza pilot promotional effort with a contract sales force targeting primary care physicians, which ended in the third quarter of 2022, partially offset by increased personnel and promotional activities related to the acquisition of V-Go in May 2022.
Our future success is dependent on our, and our current and future collaboration partners’, ability to effectively commercialize our approved products. Our future success is also dependent on our pipeline of new products. There is a high rate of failure inherent in the research and development process for new drugs.
Manufacturing risks may adversely affect our ability to manufacture our products and could reduce our gross margin or impact our collaboration with UT. Our future success is dependent on our, and our current and future collaboration partners’, ability to effectively commercialize approved products. Our future success is also dependent on our pipeline of new products.
See Note 11 – Collaboration, Licensing and Other Arrangements in the consolidated financial statements included in Part II, Item 8 – Financial Statements and Supplementary Data.
See Note 16 – Commitments and Contingencies of the Notes to Consolidated Financial Statements included in Part II, Item 8 — Financial Statements and Supplementary Data. Our royalty revenue reflects the upward trend in demand for Tyvaso DPI in the marketplace.
Cash provided by financing activities of $270.3 million for the year ended December 31, 2021 was primarily due to net proceeds from the offering of Senior convertible notes of $222.7 million and net proceeds from the sale-leaseback transaction of $99.1 million, partially offset by the repayment of $35.1 million of Mann Group non-convertible notes and related unpaid accrued interest and the repayment of $10.0 million of principal and $1.0 million prepayment penalty for the MidCap credit facility.
Cash provided by financing activities of $136.6 million for the year ended December 31, 2023 was primarily due to proceeds of $150.0 million from the sale of a portion of our future royalties from net sales of Tyvaso DPI and net proceeds from at-the-market offerings of $6.8 million, partially offset by $10.2 million in payments for taxes related to net issuance of common stock associated with restricted stock units and stock options, and principal payments of $6.7 million on the MidCap credit facility.
Liquidity and Capital Resources Our principal sources of liquidity are our cash, cash equivalents, and investments.
Our revenues from royalties from collaborations during the fourth quarter of 2023 totaled $21.0 million, of which $2.1 million will be remitted to the royalty purchaser. Liquidity and Capital Resources Our principal sources of liquidity are our cash, cash equivalents, and investments.