Biggest changeResults of Operations Comparison of the Years Ended December 31, 2023 and 2022 The following table summarizes our results of operations for the years ended December 31, 2023 and 2022: Year Ended December 31, 2023 2022 $ Change Revenues: Grant revenue $ 7,046 $ 4,930 $ 2,116 Collaboration revenue - related party 95,802 46,076 49,726 Collaboration revenue 933 2,503 (1,570 ) Total revenues 103,781 53,509 50,272 Operating expenses: Research and development 51,440 47,593 3,847 General and administrative 25,554 36,483 (10,929 ) Impairment of long-term asset 5,306 — 5,306 Restructuring — 11,630 (11,630 ) Total operating expenses 82,300 95,706 (13,406 ) Income (loss) from operations 21,481 (42,197 ) 63,678 Other income (expense): Interest income 3,937 1,106 2,831 Other income (expense), net (14 ) (55 ) 41 Interest expense related to the sale of future royalties — (2,605 ) 2,605 Loss on extinguishment of liability related to the sale of future royalties — (3,581 ) 3,581 Change in fair value of derivative liability — 917 (917 ) Total other income (expense), net 3,923 (4,218 ) 8,141 Net income (loss) before income taxes 25,404 (46,415 ) 71,819 Income tax expense (2,598 ) — (2,598 ) Net income (loss) $ 22,806 $ (46,415 ) $ 69,221 81 Grant Revenue Year Ended December 31, 2023 2022 $ Change BARDA Contract (Tebipenem HBr) $ 4,361 $ 2,178 $ 2,183 NIAID Contract (SPR206) 2,685 1,736 949 DoD Agreement (SPR206) — 1,016 (1,016 ) Total revenue $ 7,046 $ 4,930 $ 2,116 Grant revenue recognized during 2023 and 2022 consisted of the reimbursement of qualifying expenses incurred in connection with our various government awards.
Biggest changeThese factors raise substantial doubt about our ability to continue as a going concern. 84 Comparison of the Years Ended December 31, 2024 and 2023 The following table summarizes our results of operations for the years ended December 31, 2024 and 2023: Year Ended December 31, 2024 2023 $ Change Revenues: Grant revenue $ 20,581 $ 7,046 $ 13,535 Collaboration revenue - related party 27,025 95,802 (68,777 ) Collaboration revenue 371 933 (562 ) Total revenues 47,977 103,781 (55,804 ) Operating expenses: Research and development 96,757 51,440 45,317 General and administrative 23,704 25,554 (1,850 ) Restructuring 877 — 877 Impairment of long-term asset — 5,306 (5,306 ) Total operating expenses 121,338 82,300 39,038 Income (loss) from operations (73,361 ) 21,481 (94,842 ) Other income (expense): Interest income 4,735 3,937 798 Other income (expense), net 60 (14 ) 74 Total other income, net 4,795 3,923 872 Net income (loss) before income taxes (68,566 ) 25,404 (93,970 ) Income tax expense - (2,598 ) 2,598 Net income (loss) $ (68,566 ) $ 22,806 $ (91,372 ) Grant Revenue Year Ended December 31, 2024 2023 $ Change BARDA Contract (Tebipenem HBr) $ 20,200 $ 4,361 $ 15,839 NIAID Contract (SPR206) 381 2,685 (2,304 ) Total revenue $ 20,581 $ 7,046 $ 13,535 Grant revenue recognized during 2024 and 2023 consisted of the reimbursement of qualifying expenses incurred in connection with our various government awards.
Operating Expenses Research and Development Expenses Research and development expenses consist primarily of costs incurred for our research activities, including our drug discovery efforts, and the development of our product candidates, which include: • employee-related expenses, including salaries, related benefits, travel and share-based compensation expense for employees engaged in research and development functions; • expenses incurred in connection with the preclinical and clinical development of our product candidates, including under agreements with contract research organizations (“CROs”); • costs incurred in connection with our government awards; • the cost of consultants and contract manufacturing organizations (“CMOs”) that manufacture drug products for use in our preclinical studies and clinical trials; • facilities, depreciation and other expenses, which include direct and allocated expenses for rent and maintenance of facilities, insurance and supplies; and • payments made under third-party licensing agreements.
Operating Expenses Research and Development Expenses Research and development expenses consist primarily of costs incurred for our research activities, including our drug discovery efforts, and the development of our product candidates, which include: • employee-related expenses, including salaries, related benefits, travel and share-based compensation expense for employees engaged in research and development functions; 80 • expenses incurred in connection with the preclinical and clinical development of our product candidates, including under agreements with contract research organizations (“CROs”); • costs incurred in connection with our government awards; • the cost of consultants and contract manufacturing organizations (“CMOs”) that manufacture drug products for use in our preclinical studies and clinical trials; • facilities, depreciation and other expenses, which include direct and allocated expenses for rent and maintenance of facilities, insurance and supplies; and • payments made under third-party licensing agreements.
Revenue from government grants is recognized as the qualifying expenses related to the contracts are incurred, provided that there is reasonable assurance of recoverability. Revenue recognized upon incurring qualifying expenses in advance of receipt of funding is recorded as unbilled receivables, a component of prepaid expenses and other current assets, in the consolidated balance sheet.
Revenue from government grants is recognized as the qualifying expenses related to the contracts are incurred, provided that 82 there is reasonable assurance of recoverability. Revenue recognized upon incurring qualifying expenses in advance of receipt of funding is recorded as unbilled receivables, a component of prepaid expenses and other current assets, in the consolidated balance sheet.
Beyond this point we will need additional funding, which we expect will primarily consist of raising additional capital through some combination of equity or debt financings, potential new collaborations or additional grant funding. If we are not able to secure adequate additional funding, we plan to make reductions in spending.
Beyond this point we will need additional funding, which we expect will primarily consist of raising additional capital through some combination of equity or debt financings, potential new collaborations or additional grant funding. If we are not able to secure adequate additional funding, we plan to make further reductions in spending.
Until such time, if ever, as we can generate substantial product revenue, we expect to finance our operations through a combination of equity offerings, debt financings, government funding, collaborations, strategic alliances and marketing, distribution or 85 licensing arrangements.
Until such time, if ever, as we can generate substantial product revenue, we expect to finance our operations through a combination of equity offerings, debt financings, government funding, collaborations, strategic alliances and marketing, distribution or licensing arrangements.
We recognize funding received from BARDA, the DoD and the NIAID of the NIH, as revenue, rather than as a reduction of research and development expenses, because we are the principal in conducting the research and development activities and these contracts are central to our ongoing operations.
We recognize funding received from BARDA and the NIAID of the NIH, as revenue, rather than as a reduction of research and development expenses, because we are the principal in conducting the research and development activities and these contracts are central to our ongoing operations.
To date, there have not been any material adjustments to our prior estimates of accrued research and development expenses. 80 Share-Based Compensation We issue stock-based awards to employees and directors in the form of stock options and restricted stock units.
To date, there have not been any material adjustments to our prior estimates of accrued research and development expenses. Share-Based Compensation We issue stock-based awards to employees and directors in the form of stock options and restricted stock units.
If we fail to raise capital or enter into such agreements as, and when, needed, we may have to significantly delay, scale back or discontinue the development and commercialization of one or more of our product candidates. 76 Because of the numerous risks and uncertainties associated with pharmaceutical product development, we are unable to accurately predict the timing or amount of increased expenses or when or if we will be able to achieve or maintain profitability.
If we fail to raise capital or enter into such agreements as, and when needed, we may have to significantly delay, scale back or discontinue the development and commercialization of one or more of our product candidates. 79 Because of the numerous risks and uncertainties associated with pharmaceutical product development, we are unable to accurately predict the timing or amount of increased expenses or when or if we will be able to achieve or maintain profitability.
Since our inception in 2013, we have focused substantially all of our efforts and financial resources on acquiring and developing product and technology rights, building our intellectual property portfolio and conducting research and development activities for our product candidates. We do not have any products approved for sale and have not generated any revenue from product sales.
Since our inception in 2013, we have focused our efforts and financial resources on acquiring and developing product and technology rights, building our intellectual property portfolio and conducting research and development activities for our product candidates. We do not have any products approved for sale and have not generated any revenue from product sales.
This is due to the numerous risks and uncertainties, including the following: • successful completion of clinical trials with safety, tolerability and efficacy profiles that are satisfactory to the FDA or any comparable foreign regulatory authority, including on account of the disruptive impacts of the COVID-19 pandemic; • receipt of marketing approvals from applicable regulatory authorities; • establishment of arrangements with third-party manufacturers to obtain manufacturing supply; • obtainment and maintenance of patent, trade secret protection and regulatory exclusivity, both in the United States and internationally, including our ability to maintain our license agreement with Meiji with respect to tebipenem HBr; • protection of our rights in our intellectual property portfolio; • launch of commercial sales of our product candidates, if approved, whether alone or in collaboration with others; • acceptance of our product candidates, if approved, by patients, the medical community and third-party payors; • competition with other therapies; and • a continued acceptable safety profile of our product candidates, if approved.
This is due to the numerous risks and uncertainties, including the following: • successful completion of clinical trials with safety, tolerability and efficacy profiles that are satisfactory to the FDA or any comparable foreign regulatory authority, including on account of the disruptive impacts of any global health, economic or political crises; • receipt of marketing approvals from applicable regulatory authorities; • establishment of arrangements with third-party manufacturers to obtain manufacturing supply; • obtainment and maintenance of patent, trade secret protection and regulatory exclusivity, both in the United States and internationally, including our ability to maintain our license agreement with Meiji with respect to tebipenem HBr; • protection of our rights in our intellectual property portfolio; • launch of commercial sales of our product candidates, if approved, whether alone or in collaboration with others; • acceptance of our product candidates, if approved, by patients, the medical community and third-party payors; • competition with other therapies; and • a continued acceptable safety profile of our product candidates, if approved.
The timing and amount of our operating expenditures will depend largely on: • the timing and costs of our ongoing and planned clinical trials; • the initiation, progress, timing, costs and results of preclinical studies and clinical trials of our product candidates and potential new product candidates; • the amount of funding that we receive under government contracts that we have applied for; • the number and characteristics of product candidates that we pursue; • the outcome, timing and costs of seeking regulatory approvals; • the costs of commercialization activities for our product candidates if we receive marketing approval, including the costs and timing of establishing product sales, marketing, distribution and manufacturing capabilities; • the terms and timing of any future collaborations, licensing or other arrangements that we may establish; • the amount and timing of any payments we may be required to make, or that we may receive, in connection with the licensing, filing, prosecution, defense and enforcement of any patents or other intellectual property rights, including milestone and royalty payments and patent prosecution fees that we are obligated to pay pursuant to our license agreements; • the costs of preparing, filing and prosecuting patent applications, maintaining and protecting our intellectual property rights and defending against any intellectual property related claims; • the costs of operating as a public company; and • the extent to which we in-license or acquire other products and technologies.
Funding Requirements Our future use of operating cash and capital requirements, and the timing and amount thereof, will depend largely on: • the timing and costs of our ongoing and planned clinical trials; • the initiation, progress, timing, costs and results of preclinical studies and clinical trials of our product candidates and potential new product candidates; • the amount of funding that we receive under government contracts that we have applied for or may apply for in the future; • the number and characteristics of product candidates that we pursue; • the outcome, timing and costs of seeking regulatory approvals; • the costs of commercialization activities for our product candidates if we receive marketing approval, including the costs and timing of establishing product sales, marketing, distribution and manufacturing capabilities; • the terms and timing of any future collaborations, licensing or other arrangements that we may establish; • the amount and timing of any payments we may be required to make, or that we may receive, in connection with the licensing, filing, prosecution, defense and enforcement of any patents or other intellectual property rights, including milestone and royalty payments and patent prosecution fees that we are obligated to pay pursuant to our license agreements; • the costs of preparing, filing and prosecuting patent applications, maintaining and protecting our intellectual property rights and defending against any intellectual property related claims; • the costs of operating as a public company; • the extent to which we in-license or acquire other products and technologies; and • costs associated with litigation and any government investigation.
Under an agreement we entered into with PBB, we are obligated to make milestone payments of up to $5.8 million upon the achievement of specified clinical milestones and a payment of £5.0 million ($6.4 million as of December 31, 2023) upon the achievement of a specified commercial milestone for SPR206.
Under an agreement we entered into with PBB, we are obligated to make milestone payments of up to $5.8 million upon the achievement of specified clinical milestones and a payment of £5.0 million ($6.3 million as of December 31, 2024) upon the achievement of a specified commercial milestone for SPR206.
As of December 31, 2023, we also had federal and state research and development tax credit carryforwards of $6.0 million and $2.1 million, respectively, which begin to expire in 2033 and 2028, respectively. We have recorded a full valuation allowance against our net deferred tax assets at each balance sheet date.
As of December 31, 2024, we also had federal and state research and development tax credit carryforwards of $6.2 million and $2.1 million, respectively, which begin to expire in 2036 and 2033, respectively. We have recorded a full valuation allowance against our net deferred tax assets at each balance sheet date.
Contractual Obligations and Commitments The following table summarizes our contractual obligations as of December 31, 2023 and the effects that such obligations are expected to have on our liquidity and cash flows in future periods: Payments Due by Period Total Less Than 1 Year 1 to 3 Years 4 to 5 Years More than 5 Years (in thousands) Operating lease commitments (1) 6,576 1,718 4,858 1,156 — Total $ 6,576 $ 1,718 $ 4,858 $ 1,156 $ — (1) Reflects payments due for our lease of office space under an operating lease agreement that expires in 2027.
Contractual Obligations and Commitments The following table summarizes our contractual obligations as of December 31, 2024 and the effects that such obligations are expected to have on our liquidity and cash flows in future periods: Payments Due by Period Total Less Than 1 Year 1 to 3 Years 4 to 5 Years More than 5 Years (in thousands) Operating lease commitments (1) 4,858 1,746 3,112 — — Total $ 4,858 $ 1,746 $ 3,112 $ — $ — (1) Reflects payments due for our lease of office space under an operating lease agreement that expires in 2027.
Personnel-related costs for the years ended December 31, 2023 and 2022 included share-based compensation expenses of $2.7 million and $3.7 million, respectively. 82 Facility-related and other costs primarily reflect costs related to supporting our research and development staff.
Personnel-related costs for the years ended December 31, 2024 and 2023 included share-based compensation expenses of $2.6 million and $2.7 million, respectively. Facility-related and other costs primarily reflect costs related to supporting our research and development staff.
If we raise additional funds through collaborations, strategic alliances or marketing, distribution or licensing arrangements with third parties, we may have to relinquish valuable rights to our technologies, future revenue streams, research programs or product candidates or grant licenses on terms that may not be favorable to us. There is ongoing volatility in financial markets.
If we raise additional funds through collaborations, strategic alliances or marketing, distribution or licensing arrangements with third parties, we may have to relinquish valuable rights to our technologies, future revenue streams, research programs or product candidates or grant licenses on terms that may not be favorable to us.
Payments due upon cancellation consist only of payments for services provided or expenses incurred, including non-cancellable obligations of our service providers, up to the date of cancellation. These payments are not included in the table of contractual obligations and commitments above.
These contracts are cancelable by us upon prior notice. Payments due upon cancellation consist only of payments for services provided or expenses incurred, including non-cancellable obligations of our service providers, up to the date of cancellation. These payments are not included in the table of contractual obligations and commitments above.
We have also granted certain awards with performance-based criteria. Restructuring We made estimates and judgments regarding the amount and timing of our restructuring expense and liability, including one-time termination benefits and other exit costs accounted for upon the announcement of our restructuring in May 2022. Restructuring charges are reflected in our consolidated statements of income.
We have also granted certain awards with performance-based criteria. Restructuring We made estimates and judgments regarding the amount and timing of our restructuring expense and liability, including one-time termination benefits accounted for upon the announcement of our restructuring in October 2024. Restructuring charges are reflected in our consolidated statements of income.
To date, we have funded our operations with payments received under license and collaboration agreements and funding from government contracts, and from the proceeds of multiple common stock offerings. As of December 31, 2023, we had cash and cash equivalents of $76.3 million.
To date, we have funded our operations with payments received under license and collaboration agreements and funding from government contracts, and from the proceeds of multiple common stock offerings. As of December 31, 2024, we had cash and cash equivalents of $52.9 million.
If our access to capital is restricted or associated borrowing costs increase as a result of developments in financial markets, including relating to the COVID-19 pandemic, our operations and financial condition could be adversely impacted.
If our access to capital is restricted or associated borrowing costs increase as a result of developments in financial markets, our operations and financial condition could be adversely impacted.
Grant Revenue We expect a portion of our revenue for the next few years will continue to be derived from payments under our active government awards and any awards that we may enter into in the future. Collaboration Revenue Collaboration revenue relates to our agreements with Everest, Pfizer and GSK.
Grant Revenue We expect a portion of our revenue will continue to be derived from payments under our active government awards and any awards that we may receive in the future. Collaboration Revenue Current collaboration revenue relates to our agreements with Pfizer and GSK.
Facility-related and other costs primarily reflect costs related to supporting our general and administrative staff. Impairment of Long-Term Asset In 2023, we concluded that we have no future use for the Savior facility (further described in Note 14 – License, Collaboration and Service Agreements to our consolidated financial statements appearing elsewhere in this Annual Report on Form 10-K).
Impairment of Long-Term Asset 86 In 2023, we concluded that we have no future use for the Savior facility (further described in Note 13 – License, Collaboration and Service Agreements to our consolidated financial statements appearing elsewhere in this Annual Report on Form 10-K).
Income Tax Expense During the year ended December 31, 2023, we recorded $2.6 million of income tax expense primarily related to a change in estimate with respect to the tax treatment of the GSK License Agreement.
Income Tax Expense During the year ended December 31, 2023, we recorded $2.6 million of income tax expense primarily related to a change in estimate with respect to the tax treatment of the GSK License Agreement. Other Income, Net Other income, net was $4.8 million during 2024, compared to $3.9 million during 2023.
Personnel-related costs for the years ended December 31, 2023 and 2022 included share-based compensation expense of $5.3 million and $5.4 million, respectively. The decrease in professional and consultant fees of $4.0 million was primarily due to decreased commercial operation expenses, offset by legal and consulting expenses incurred during the year ended December 31, 2023.
Personnel-related costs for the years ended December 31, 2024 and 2023 included share-based compensation expense of $5.2 million and $5.3 million, respectively. The increase in professional and consultant fees was primarily due to increased legal and consulting expenses incurred during the year ended December 31, 2024.
Under our agreement with Vertex, we are obligated to make future milestone payments of up to $80.2 million upon the achievement of specified clinical, regulatory and commercial milestones related to SPR720 and to pay to Vertex tiered royalties, on a product-by-product and country-by-country basis, of a mid single-digit to low double-digit percentage based on net sales of products licensed under the agreement.
Under our agreement with Vertex, we are obligated to make future milestone payments of up to $80.2 million upon the achievement of specified clinical, regulatory and commercial milestones related to SPR720 and to pay to Vertex tiered royalties, on a product-by-product and country-by-country basis, of a mid-single-digit to low double-digit percentage based on net sales of products licensed under the agreement. 89 We enter into contracts in the normal course of business with CROs, CMOs and other third parties for clinical trials, preclinical research studies and testing, manufacturing and other services.
In addition, as of December 31, 2023, we had foreign net operating loss carryforwards of $4.6 million, which may be available to offset future income tax liabilities and do not expire.
The state NOLs begin to expire in 2034 and will expire at various dates through 2044. In addition, as of December 31, 2024, we had foreign net operating loss carryforwards of $4.6 million, which may be available to offset future income tax liabilities and do not expire.
Collaboration Revenue - Related Party During the years ended December 31, 2023 and 2022, collaboration revenue - related party related to revenue recognized under the GSK License Agreement.
Collaboration Revenue - Related Party During the years ended December 31, 2024 and 2023, collaboration revenue - related party related to revenue recognized under the GSK License Agreement. During the year ended December 31, 2024, we recognized $27.0 million in collaboration revenue - related party under the GSK License Agreement.
During the year ended December 31, 2022 we recognized collaboration revenue - related party of $46.1 million. Collaboration Revenue During the year ended December 31, 2023 we recognized $0.9 million in collaboration revenue related to our agreement with Pfizer.
Collaboration Revenue During the year ended December 31, 2024 we recognized $0.4 million in collaboration revenue related to our agreement with Pfizer.
Cash Flows The following table summarizes our sources and uses of cash for the years ended December 31, 2023 and 2022: Year Ended December 31, 2023 2022 Cash used in operating activities $ (32,995 ) $ (7,731 ) Cash provided by investing activities — 33,807 Cash provided by (used in) financing activities 221 (29,553 ) Net increase (decrease) in cash and cash equivalents $ (32,774 ) $ (3,477 ) Operating Activities Net cash used in operating activities for the year ended December 31, 2023 was $33.0 million, primarily resulting from our net income of $22.8 million, adjusted for net non-cash items of $14.6 million (primarily due to stock-based compensation and asset impairment).
Cash Flows The following table summarizes our sources and uses of cash for the years ended December 31, 2024 and 2023: Year Ended December 31, 2024 2023 Cash used in operating activities $ (23,444 ) $ (32,995 ) Cash provided by financing activities — 221 Net decrease in cash and cash equivalents $ (23,444 ) $ (32,774 ) Operating Activities Net cash used in operating activities for the year ended December 31, 2024 was $23.4 million, primarily resulting from our net loss of $68.6 million, adjusted for net non-cash items of $8.8 million (primarily due to stock-based compensation).
Beyond this point we will need additional funding, which primarily consist of raising additional capital through some combination of equity or debt financings, potential new collaborations, additional grant funding and/or reducing cash expenditures. If we are not able to secure adequate additional funding, we plan to make reductions in spending.
This timeline is subject to uncertainty as to the timing of future expenditures. We have developed plans to mitigate this risk, which primarily consist of raising additional capital through some combination of equity or debt financings, potential new collaborations and/or reducing cash expenditures. If we are not able to secure adequate additional funding, we plan to make reductions in spending.
We are developing SPR206 to treat MDR Gram-negative bacterial infections in the hospital setting. We believe that our novel product candidates, if successfully developed and approved, could provide meaningful benefits to patients suffering from serious rare orphan diseases and life-threatening bacterial infections, in both the community and hospital settings.
We believe that our novel product candidates, if successfully developed and approved, could provide meaningful benefits to patients suffering from serious rare diseases and life-threatening bacterial infections, in both the community and hospital settings. Our pipeline consists of mid-to late-stage clinical assets.
The increase in revenue during 2023 was primarily due to an increase of $2.2 million in funding under our BARDA contract for tebipenem HBr and an increase of $0.9 million in qualified expenses incurred under our NIAID award relating to SPR206, partially offset by a decrease funding of $1.0 million under our DoD agreement relating to SPR206.
The increase in revenue during 2024 was primarily due to an increase of $15.8 million in funding under our BARDA contract related to our pivotal Phase 3 clinical trial of tebipenem HBr, partially offset by a decrease of $2.3 million in qualified expenses incurred under our NIAID award relating to SPR206.
Total other income for the year ended December 31, 2023 included $3.9 million of interest income, offset by fluctuations in unrealized foreign currency.
Total other income for the year ended December 31, 2023 included $3.9 million of interest income, offset by fluctuations in unrealized foreign currency. Liquidity and Capital Resources Since our inception, we have incurred significant operating losses.
Net cash provided by investing activities for the year ended December 31, 2022 was $33.8 million, primarily related to the maturities of marketable securities of $60.8 million, offset by purchases of marketable securities of $27.0 million. 84 Financing Activities Cash provided by financing activities during the year ended December 31, 2023 was $0.2 million, due to the $0.2 million net sales of common stock under our Sales Agreement.
Cash provided by financing activities during the year ended December 31, 2023 was $0.2 million, due to the $0.2 million net sales of common stock under our Sales Agreement.
We base our expenses related to preclinical studies and clinical trials on our estimates of the services received and efforts expended pursuant to quotes and contracts with multiple research institutions and CROs that conduct and manage preclinical studies and clinical trials on our behalf.
Examples of estimated accrued research and development expenses include fees paid to: • vendors in connection with the preclinical development activities; • CMOs in connection with the production of preclinical and clinical trial materials; • CROs in connection with preclinical and clinical studies; and • investigative sites in connection with clinical trials. 83 We base our expenses related to preclinical studies and clinical trials on our estimates of the services received and efforts expended pursuant to quotes and contracts with multiple research institutions and CROs that conduct and manage preclinical studies and clinical trials on our behalf.
For further information, refer to Note 10 – Restructuring to the consolidated financial statements appearing elsewhere in this Annual Report on Form 10-K. Other Income (Expense), Net Other income (expense), net was $3.9 million during 2023, compared to $(4.2) million during 2022.
For further information, refer to Note 9 – Restructuring to the consolidated financial statements appearing elsewhere in this Annual Report on Form 10-K.
As of December 31, 2023, we had cash and cash equivalents of $76.3 million.
As of December 31, 2024, we had cash and cash equivalents of $52.9 million.
As of December 31, 2023, all of these costs were paid. Other Income (Expense) Interest Income (Expense) Interest income (expense) consists of interest expense related to the sale of future royalties and interest earned on our cash equivalents, which are primarily invested in money market accounts, as well as interest earned on our investments in marketable securities.
Other Income (Expense) Interest Income (Expense) Interest income (expense) consists of interest income related to the significant financing component related to the GSK License Agreement and interest earned on our cash equivalents, which are primarily invested in money market accounts, as well as interest earned on our investments in marketable securities.
Changes in accounts payable, accrued expenses and other current liabilities and prepaid expenses and other current assets in all periods were generally due to the advancement of our development programs, the timing of vendor invoicing and payments and write-offs during the second quarter of 2022 related to our strategic restructuring.
Changes in accounts payable, accrued expenses and other current liabilities and prepaid expenses and other current assets in all periods were generally due to the advancement of our programs and the timing of vendor invoicing and payments. Changes in deferred revenue are related to the GSK License Agreement and our license agreement with Pfizer.
The related costs incurred by us are included in research and development expense in our consolidated statements of operations and comprehensive loss. 79 Collaboration Agreements For collaboration agreements with a third party, to determine the appropriate statement of operations classification of the recognized funding, we first assess whether the collaboration arrangement is within the scope of the accounting guidance for collaboration arrangements.
Collaboration Agreements For collaboration agreements with a third party, to determine the appropriate statement of operations classification of the recognized funding, we first assess whether the collaboration arrangement is within the scope of the accounting guidance for collaboration arrangements.
As of December 31, 2023, we had federal and state net operating loss carryforwards of $94.7 million and $90.9 million, respectively, which may be available to offset future income tax liabilities. All federal NOLs can be carried forward indefinitely. The state NOLs begin to expire in 2033 and will expire at various dates through 2043.
As of December 31, 2024, we had federal and state net operating loss carryforwards ("NOLs") of $165.2 million and $120.6 million, respectively which may be available to offset future income tax liabilities. $152.0 million of the federal NOLs can be carried forward indefinitely and $13.2 million of the federal NOLs begin to expire in 2034.
Changes in deferred revenue are primarily related to the GSK License Agreement and our license agreement with Pfizer. Changes in collaboration receivable related to the GSK License Agreement. Investing Activities We did not undertake any investing activities during the year ended December 31, 2023.
Changes in collaboration receivable - related party related to the GSK License Agreement. Investing Activities We did not undertake any investing activities during either of the years ended December 31, 2024 or 2023. 87 Financing Activities We did not undertake any financing activities during the year ended December 31, 2024.
General and Administrative Expenses Year Ended December 31, 2023 2022 $ Change Personnel related (including share-based compensation) $ 15,324 $ 20,433 $ (5,109 ) Professional and consultant fees 8,151 12,140 (3,989 ) Facility related and other 2,079 3,910 (1,831 ) Total general and administrative expenses $ 25,554 $ 36,483 $ (10,929 ) The decrease in personnel-related costs of $5.1 million was primarily a result of decreased headcount costs in our commercial and general and administrative functions as a result of our strategic restructuring.
General and Administrative Expenses Year Ended December 31, 2024 2023 $ Change Personnel related (including share-based compensation) $ 13,188 $ 15,324 $ (2,136 ) Professional and consultant fees 8,198 8,151 47 Facility related and other 2,318 2,079 239 Total general and administrative expenses $ 23,704 $ 25,554 $ (1,850 ) The decrease in personnel-related costs of $2.1 million was primarily a result of decreased headcount costs in our general and administrative functions during the period.
Product candidates in later stages of clinical development generally have higher development costs than those in earlier stages of clinical development, primarily due to the increased size and duration of later-stage clinical trials. 77 At this time, we cannot reasonably estimate or know the nature, timing and costs of the efforts that will be necessary to complete the preclinical and clinical development of any of our product candidates.
At this time, we cannot reasonably estimate or know the nature, timing and costs of the efforts that will be necessary to complete the preclinical and clinical development of any of our product candidates. The successful development and commercialization of our product candidates is highly uncertain.
Restructuring During the year ended December 31, 2022, we incurred restructuring expenses of $11.6 million related to our strategic restructuring that we announced in May 2022. Restructuring expenses for the period were primarily comprised of $8.6 million of severance and other employee costs and $3.0 million of discontinuation costs such as contract termination fees and lease impairment expenses.
Facility-related and other costs primarily reflect costs related to supporting our general and administrative staff. Restructuring During the year ended December 31, 2024, we incurred restructuring expenses of $0.9 million related to our strategic restructuring that we announced in October 2024. Restructuring expenses for the period were primarily comprised of severance and other employee costs.
In that event, we may have to delay, scale back, or eliminate some or all of our planned clinical trials and research stage programs. We have based these estimates on assumptions that may prove to be wrong, and we could utilize our available capital resources sooner than we expect.
In that event, we may have to delay, scale back, or eliminate some or all of our planned clinical trials, and research stage.
Other Income (Expense), Net Other income (expense), net, consists of insignificant amounts of miscellaneous income, as well as the loss on extinguishment of liability related to the sale of future royalties, the change in the fair value of our derivative liability, realized and unrealized gains and losses from foreign currency-denominated cash balances, vendor payables and receivables related to the Australian research and development tax incentive. 78 Income Taxes We have not recorded any income tax benefits for the net losses we have incurred in each year or for our earned research and development tax credits, as we believe, based upon the weight of available evidence, that it is more likely than not that all of our net operating loss carryforwards and tax credits will not be realized.
Income Taxes Except for year ended December 31, 2022, we have not recorded any income tax benefits for the net losses we have incurred in each year or for our earned research and development tax credits, as we believe, based upon the weight of available evidence, that it is more likely than not that all of our net operating loss carryforwards and tax credits will not be realized.
Overview We are a multi-asset, clinical-stage biopharmaceutical company focused on identifying and developing novel treatments for rare diseases and and diseases caused by MDR bacterial infections with high unmet need. Our wholly-owned lead product candidate, SPR720, is an oral antimicrobial agent in development for the treatment of NTM pulmonary disease, a rare orphan disease.
Overview We are a clinical-stage biopharmaceutical company focused on identifying and developing novel treatments for rare diseases and diseases caused by MDR bacterial infections with high unmet need.
In connection with our restructuring, during the year ended December 31, 2022 we incurred approximately $11.6 million of costs in connection with the reduction in workforce related to severance pay and other restructuring costs. We incurred the majority of the costs associated with our restructuring during the second quarter of 2022.
In connection with our restructuring, we estimate that we will incur approximately $1.1 million of costs in connection with the reduction in workforce related to severance pay and other related termination benefits of which we incurred $0.9 million during the year ended December 31, 2024 and anticipate the remaining to be incurred in 2025.
Research and Development Expenses Year Ended December 31, 2023 2022 $ Change Direct research and development expenses by program: SPR720 $ 13,031 $ 2,793 $ 10,238 Tebipenem HBr 16,695 17,064 (369 ) SPR206 3,240 4,424 (1,184 ) Unallocated expenses: Personnel related (including share-based compensation) 13,788 18,918 (5,130 ) Facility related and other 4,686 4,394 292 Total research and development expenses $ 51,440 $ 47,593 $ 3,847 Direct costs related to our SPR720 program increased by $10.2 million during 2023 compared to 2022, due to increased clinical activity during the period related to our ongoing Phase 2a clinical trial of SPR720, which we initiated in the fourth quarter of 2022.
During the year ended December 31, 2023 we recognized $0.9 million in collaboration revenue related to our agreement with Pfizer. 85 Research and Development Expenses Year Ended December 31, 2024 2023 $ Change Direct research and development expenses by program: Tebipenem HBr $ 60,502 $ 16,695 $ 43,807 SPR720 16,626 13,031 3,595 SPR206 570 3,240 (2,670 ) Unallocated expenses: Personnel related (including share-based compensation) 14,111 13,788 323 Facility related and other 4,948 4,686 262 Total research and development expenses $ 96,757 $ 51,440 $ 45,317 Direct costs related to our tebipenem HBr program increased by $43.8 million during the year ended December 31, 2024, compared to the year ended December 31, 2023, due to increased clinical activities related to our Phase 3 clinical trial of tebipenem HBr, which we initiated in the fourth quarter of 2023.
We also anticipate that we will continue to incur accounting, audit, legal, regulatory, compliance, infrastructure and director and officer insurance costs, as well as investor and public relations expenses associated with our continued operation as a public company.
We anticipate that we will continue to incur accounting, audit, legal, regulatory, compliance, infrastructure and director and officer insurance costs, as well as investor and public relations expenses associated with our continued operation as a public company. 81 Restructuring In light of our decision to suspend planned development activities for our oral SPR720 program and our strategic restructuring, we expect that our future expenses relating to development activities with respect to SPR720 will be substantially reduced as we evaluate potential paths forward for SPR720 and implement our restructuring.
During this period, we plan to prioritize advancing SPR720 to key Phase 2 milestones, advancing the Phase 3 clinical trial activities for tebipenem HBr under our GSK License Agreement and advancing SPR206 Phase 2 activities contingent on obtaining non-dilutive financing.
During this period, we plan to prioritize advancing the Phase 3 clinical trial activities for tebipenem HBr under our GSK License Agreement and completing our analysis of the full dataset from the 25 treated patients in the Phase 2a proof-of-concept trial of SPR720.
We have experienced net losses and significant cash outflows from cash used in operating activities since our inception through 2022. Our ability to generate product revenue sufficient to achieve profitability will depend heavily on the successful development and eventual commercialization of one or more of our product candidates.
Our ability to generate product revenue sufficient to achieve profitability will depend heavily on the successful development and eventual commercialization of one or more of our product candidates. As of December 31, 2024, we had an accumulated deficit of $459.6 million, and cash and cash equivalents of $52.9 million.
Direct costs related to our SPR206 program decreased by $1.2 million during the year ended December 31, 2023, primarily due to decreased preclinical activity and expenses associated with formulation development, manufacturing process and manufacturing of clinical trial material during the period. We expect to continue to incur direct costs related to SPR206 as we progress preclinical and clinical activities.
Direct costs related to our SPR206 program decreased by $2.7 million during the year ended December 31, 2024, primarily due to decreased preclinical activity.
Net cash used in operating activities for the year ended December 31, 2022 was $7.7 million, primarily resulting from our net loss of $46.4 million, adjusted for net non-cash items of $16.6 million (primarily stock-based compensation, interest expense associated with the sale of future royalties, loss on extinguishment of liability related to the sale of future royalties, change in the value of derivative liabilities and depreciation and amortization expense).
Net cash used in operating activities for the year ended December 31, 2023 was $33.0 million, primarily resulting from our net income of $22.8 million, adjusted for net non-cash items of $14.6 million (primarily due to stock-based compensation and asset impairment).
In that event, we may have to delay, scale back, or eliminate some or all of our planned clinical trials and research stage programs. We will not generate revenue from product sales unless and until we successfully complete clinical development and obtain regulatory approval for our product candidates.
In that event, we may have to delay, scale back, or eliminate some or all of our planned development activities.
As of December 31, 2023, we had an accumulated deficit of $391.1 million, and cash and cash equivalents of $76.3 million. We expect to continue to incur significant expenses and increasing operating losses for at least the next several years.
We expect to continue to incur significant expenses and operating losses for at least the next year.
Net cash provided by changes in our operating assets and liabilities was $22.1 million and consisted primarily of a $21.9 million net increase in deferred revenue, a decrease of $5.9 million in accrued expenses and accounts payable, a $5.2 million decrease in prepaid expenses and other current assets and a $1.5 million net decrease in receivables related to our tax incentive receivables and government awards.
Net cash provided by changes in our operating assets and liabilities was $36.3 million and consisted primarily of a $46.4 million decrease in our related party collaboration receivable, primarily due to the receipt of the first and second installments of the development milestone payments from GSK (see Note 13 - License, Collaboration and Service Agreements), a $26.6 million net decrease in deferred revenue, offset by an increase of $17.1 million in accrued expenses and accounts payable.
Direct costs related to our tebipenem HBr program decreased by $0.4 million during 2023 compared to 2022 as we progressed clinical and preclinical activities related to our PIVOT-PO Phase 3 trial of tebipenem HBr, which we initiated in the fourth quarter of 2023.
Direct costs related to our SPR720 program increased by $3.6 million during the year ended December 31, 2024, compared to the year ended December 31, 2023, due to clinical activity during the period related to our Phase 2a clinical trial of SPR720, which completed enrollment in the second quarter of 2024.
We believe that our existing cash and cash equivalents will enable us to fund our operating expenses and capital expenditure requirements for at least 12 months from the issuance of the financial statements included in this report. Based on our current operating plans, we believe that our cash runway will be sufficient to fund us into late 2025.
Based on our cash and cash equivalents as of December 31, 2024, together with earned and non-contingent development milestone payments from GSK, as well as other non-dilutive funding commitments, we believe that our cash runway will be sufficient to fund our operating expenses and capital expenditure requirements into the second quarter of 2026.