Research and Development Expenses
The following table discloses the breakdown of research and development expenses:
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| | Three Months Ended September 30, | | | Change | | | Nine Months Ended September 30, | | | Change | |
($ in thousands) | | 2022 | | | 2021 | | | $ | | | % | | | 2022 | | | 2021 | | | $ | | | % | |
Clinical trials | | $ | — | | | $ | 326 | | | $ | (326 | ) | | | (100 | %) | | $ | 4 | | | $ | 965 | | | $ | (961 | ) | | | (100 | %) |
External services | | | 578 | | | | 570 | | | | 8 | | | | 1 | % | | | 1,236 | | | | 992 | | | | 244 | | | | 25 | % |
Payroll and personnel expenses | | | 110 | | | | 88 | | | | 22 | | | | 25 | % | | | 279 | | | | 254 | | | | 25 | | | | 10 | % |
Other research and development expenses | | | 39 | | | | 1 | | | | 38 | | | | 3,800 | % | | | 159 | | | | 56 | | | | 103 | | | | 184 | % |
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| | $ | 727 | | | $ | 985 | | | $ | (258 | ) | | | -26 | % | | $ | 1,678 | | | $ | 2,267 | | | $ | (589 | ) | | | (26 | %) |
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Research and development expenses during the three months ended September 30, 2022 and 2021 were $0.7 million and $1.0 million, respectively. The $0.3 decrease, or 26%, was primarily related to fewer activities in clinical trials in progress during the three months ended September 30, 2022.
Research and development expenses during the nine months ended September 30, 2022 and 2021 were $1.7 million and $2.3 million, respectively. The decrease of $0.6 million, or 26%, was primarily related to fewer activities in clinical trials in progress during the nine months ended September 30, 2022, partially offset by increases in legal fees and costs in laboratory testing.
General and Administrative Expenses
General and administrative expenses and development expenses during the three months ended September 30, 2022 and 2021 were $1.0 million and $0.2 million, respectively. The increase in general and administrative expenses of $0.8 million, or 513%, was driven primarily by the recording of employee stock expense related to the grant of restricted stock units (“RSUs”), as well as increases in bonus accruals, Directors’ compensation, costs related to hiring new employees, travel, and consulting services.
General and administrative expenses and development expenses during the nine months ended September 30, 2022 and 2021 were $2.2 million and $1.1 million, respectively. The increase in general and administrative expenses of $1.1 million, or 95%, was driven primarily by an increase of employee stock expense related to the grant of RSUs, as well as increases in bonus accruals, Directors’ compensation, and costs related to hiring new employees, travel, and consulting services.
Other Income (Expense)
Other income (expense) during the three months ended September 30, 2022 and 2021 were $0.1 million and $0.0 million, respectively. The increase in other expense of $0.1 million, or 126%, related to the increase in interest expense due to additional convertible notes and the issuance of the LMFA Note (as defined below).
Other income (expense) during the nine months ended September 30, 2022 and 2021 were $0.1 million and $0.0 million, respectively. The increase in other income of $0.1 million, or 269%, related to the change in fair value of the derivative liability related to the convertible notes, which was partially offset by an increase in interest expense due to the issuance of additional convertible notes and the issuance of the LMFA Note.
Income Tax Provision (Benefit)
SeaStar Medical recorded an income tax provision (benefit) of approximately $0.0 million and $0.0 million for the three months ended September 30, 2022 and 2021, respectively.
SeaStar Medical recorded an income tax provision (benefit) of approximately $0.0 million and $0.0 million for the nine months ended September 30, 2022 and 2021, respectively.
Under ASC 740-10-30-5, Income Taxes, deferred tax assets should be reduced by a valuation allowance if, based on the weight of available evidence, it is more-likely-than-not (i.e., a likelihood of more than 50%) that some portion or all of the deferred tax assets will not be realized. SeaStar Medical considers all positive and negative evidence available in determining the potential realization of deferred tax assets including, primarily, the recent history of taxable earnings or losses. Based on operating losses reported by SeaStar Medical during 2021 and 2020, SeaStar