Summary of Significant Accounting Policies (Policies)	3 Months Ended
Mar. 31, 2024
Accounting Policies [Abstract]
Use of Estimates and Assumptions	Use of Estimates and Assumptions The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. The significant areas of estimation include determining research and development accruals, the inputs in determining the fair value of equity-based awards and warrants issued, the inputs in determining present value of lease payments, and determining the fair value of marketable securities. Actual results could differ from those estimates.
Risks and Uncertainties	Risks and Uncertainties The Company operates in an industry that is subject to intense competition, government regulation and rapid technological change. Operations are subject to significant risk and uncertainties including financial, operational, technological, regulatory, and other risks, including the potential risk of business failure. Our marketable securities have had and may in the future have their market value fluctuate due to rises or falls in interest rates. While we believe our cash, cash equivalents and marketable securities do not contain excessive risk, we cannot provide absolute assurance that in the future our investments will not be subject to adverse changes in market value. In addition, we maintain significant amounts of cash and cash equivalents at one or more financial institutions that are federally insured. Interest bearing and non-interest bearing accounts we hold at these banking institutions are guaranteed by the Federal Deposit Insurance Corporation (“FDIC”) up to $250,000 per depositor, per FDIC-insured bank, per ownership category. Substantially all of our cash balances held at banking institutions at March 31, 2024 are in excess of FDIC coverage.
Research and Development	Research and Development Research and development costs are expensed as incurred. These expenses primarily consist of payroll, contractor expenses, research study expenses, costs for manufacturing and supplies, clinical site costs and other costs for the conduct of clinical trials, costs for technical infrastructure on the cloud for the purposes of developing the Company’s RADR^® platform, and other costs for identifying, developing, and testing drug candidates. Development costs incurred by third parties are expensed as the work is performed. Costs to acquire technologies, including licenses, that are utilized in research and development and that have no alternative future use are expensed when incurred.
Cash and Cash Equivalents	Cash and Cash Equivalents The Company considers money market funds and other highly liquid instruments with a short-term maturity of 3 months or less to be cash equivalents. Cash equivalents at March 31, 2024 and December 31, 2023 were approximately $16,687,000 and $20,881,000, respectively, and are included along with cash under the caption cash and cash equivalents on the Company’s consolidated balance sheets.
Leases	Leases The Company determines whether an arrangement contains a lease at inception. Operating leases are included in operating lease right-of-use (“ROU”) assets, current portion of operating lease liabilities, and net of current portion of operating lease liabilities on our consolidated balance sheets. Lease ROU assets represent the Company’s right to use an underlying asset for the lease term and lease liabilities represent an obligation to make lease payments arising from the lease. Lease ROU assets and lease liabilities are recognized based on the present value of the future minimum lease payments over the lease term at the commencement date. As the Company’s leases do not provide an implicit rate, an incremental borrowing rate is used based on the information available at the commencement date in determining the present value of lease payments. The Company does not include options to extend or terminate the lease term unless it is reasonably certain that the Company will exercise any such options. Rent expense is recognized under the operating leases on a straight-line basis. The Company does not recognize right-of-use assets or lease liabilities for short-term leases, which have a lease term of twelve months or less, and instead will recognize lease payments as expense on a straight-line basis over the lease term.
Marketable Securities	Marketable Securities The Company’s marketable securities consist of government and agency securities, corporate bonds, and mutual funds. We classify our marketable securities as available-for-sale at the time of purchase and reevaluate such classification as of each balance sheet date. We may sell these securities at any time for use in current operations even if they have not yet reached maturity. As a result, we classify our investments, including securities with maturities beyond twelve months, as current assets in the accompanying condensed consolidated balance sheets. Available-for-sale debt and equity securities are recorded at fair value each reporting period. Unrealized gains and losses on available-for-sale debt securities are excluded from earnings and recorded as a separate component within “Accumulated other comprehensive income” or “Accumulated other comprehensive loss” on the condensed consolidated balance sheets until realized. Unrealized gains and losses on equity securities are reported within “Other income, net” on the condensed consolidated statements of operations. Interest is reported within “Interest income” and dividend income is reported within “Other income, net” on the condensed consolidated statements of operations. We evaluate our investments to assess whether the amortized cost basis is in excess of estimated fair value and determine what amount of that difference, if any, is caused by expected credit losses. Allowance for credit losses are recognized as a charge in “Other income, net” on the condensed consolidated statements of operations, and any remaining unrealized losses are included in “Accumulated other comprehensive income (loss)” on the condensed consolidated balance sheets. There were no credit losses recorded during the three months ended March 31, 2024 and 2023, and there is no allowance for credit losses reported on the condensed consolidated balance sheets as of March 31, 2024 and December 31, 2023. We determine realized gains and losses on the sale of marketable securities based on the specific identification method and record such gains and losses in “Other income, net” on the condensed consolidated statements of operations.
Recent Accounting Pronouncements	Recent Accounting Pronouncements The Company believes that the impact of recently issued standards that are not yet effective will not have a material impact on its financial position or results of operations upon adoption.

Summary of Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2024

Use of Estimates and Assumptions

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. The significant areas of estimation include determining research and development accruals, the inputs in determining the fair value of equity-based awards and warrants issued, the inputs in determining present value of lease payments, and determining the fair value of marketable securities. Actual results could differ from those estimates.

Risks and Uncertainties

Risks and Uncertainties

The Company operates in an industry that is subject to intense competition, government regulation and rapid technological change. Operations are subject to significant risk and uncertainties including financial, operational, technological, regulatory, and other risks, including the potential risk of business failure.

Our marketable securities have had and may in the future have their market value fluctuate due to rises or falls in interest rates. While we believe our cash, cash equivalents and marketable securities do not contain excessive risk, we cannot provide absolute assurance that in the future our investments will not be subject to adverse changes in market value. In addition, we maintain significant amounts of cash and cash equivalents at one or more financial institutions that are federally insured. Interest bearing and non-interest bearing accounts we hold at these banking institutions are guaranteed by the Federal Deposit Insurance Corporation (“FDIC”) up to $250,000 per depositor, per FDIC-insured bank, per ownership category. Substantially all of our cash balances held at banking institutions at March 31, 2024 are in excess of FDIC coverage.

Research and Development

Research and Development

Research and development costs are expensed as incurred. These expenses primarily consist of payroll, contractor expenses, research study expenses, costs for manufacturing and supplies, clinical site costs and other costs for the conduct of clinical trials, costs for technical infrastructure on the cloud for the purposes of developing the Company’s RADR^® platform, and other costs for identifying, developing, and testing drug candidates. Development costs incurred by third parties are expensed as the work is performed. Costs to acquire technologies, including licenses, that are utilized in research and development and that have no alternative future use are expensed when incurred.

Cash and Cash Equivalents

Cash and Cash Equivalents

The Company considers money market funds and other highly liquid instruments with a short-term maturity of 3 months or less to be cash equivalents. Cash equivalents at March 31, 2024 and December 31, 2023 were approximately $16,687,000 and $20,881,000, respectively, and are included along with cash under the caption cash and cash equivalents on the Company’s consolidated balance sheets.

Leases

Leases

The Company determines whether an arrangement contains a lease at inception. Operating leases are included in operating lease right-of-use (“ROU”) assets, current portion of operating lease liabilities, and net of current portion of operating lease liabilities on our consolidated balance sheets. Lease ROU assets represent the Company’s right to use an underlying asset for the lease term and lease liabilities represent an obligation to make lease payments arising from the lease. Lease ROU assets and lease liabilities are recognized based on the present value of the future minimum lease payments over the lease term at the commencement date. As the Company’s leases do not provide an implicit rate, an incremental borrowing rate is used based on the information available at the commencement date in determining the present value of lease payments. The Company does not include options to extend or terminate the lease term unless it is reasonably certain that the Company will exercise any such options. Rent expense is recognized under the operating leases on a straight-line basis. The Company does not recognize right-of-use assets or lease liabilities for short-term leases, which have a lease term of twelve months or less, and instead will recognize lease payments as expense on a straight-line basis over the lease term.

Marketable Securities

Marketable Securities

The Company’s marketable securities consist of government and agency securities, corporate bonds, and mutual funds. We classify our marketable securities as available-for-sale at the time of purchase and reevaluate such classification as of each balance sheet date. We may sell these securities at any time for use in current operations even if they have not yet reached maturity. As a result, we classify our investments, including securities with maturities beyond twelve months, as current assets in the accompanying condensed consolidated balance sheets. Available-for-sale debt and equity securities are recorded at fair value each reporting period. Unrealized gains and losses on available-for-sale debt securities are excluded from earnings and recorded as a separate component within “Accumulated other comprehensive income” or “Accumulated other comprehensive loss” on the condensed consolidated balance sheets until realized. Unrealized gains and losses on equity securities are reported within “Other income, net” on the condensed consolidated statements of operations. Interest is reported within “Interest income” and dividend income is reported within “Other income, net” on the condensed consolidated statements of operations. We evaluate our investments to assess whether the amortized cost basis is in excess of estimated fair value and determine what amount of that difference, if any, is caused by expected credit losses. Allowance for credit losses are recognized as a charge in “Other income, net” on the condensed consolidated statements of operations, and any remaining unrealized losses are included in “Accumulated other comprehensive income (loss)” on the condensed consolidated balance sheets. There were no credit losses recorded during the three months ended March 31, 2024 and 2023, and there is no allowance for credit losses reported on the condensed consolidated balance sheets as of March 31, 2024 and December 31, 2023. We determine realized gains and losses on the sale of marketable securities based on the specific identification method and record such gains and losses in “Other income, net” on the condensed consolidated statements of operations.

Recent Accounting Pronouncements

Recent Accounting Pronouncements

The Company believes that the impact of recently issued standards that are not yet effective will not have a material impact on its financial position or results of operations upon adoption.