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Fair Value Measurements (Tables) | 3 Months Ended
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Mar. 31, 2024
Fair Value Disclosures [Abstract] |
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] | The following tables summarize the Company's financial assets and liabilities measured at fair value on a recurring basis as of March 31, 2024 and December 31, 2023 (in thousands):
|  |  |  |  |  | Fair Value Measurements |
|  | Carrying Amount as of |  |  | As of December 31, 2023 |
|  | March 31, 2024 |  |  | Level 1 |  |  | Level 2 |  |  | Level 3 |
Money market funds |  | $ | 7,101 |  |  | $ | 7,101 |  |  | $ | — |  |  | $ | — |
Investments in employee deferred compensation trusts |  |  | 1,407 |  |  |  | 1,407 |  |  |  | — |  |  |  | — |
|  |  |  |  |  | Fair Value Measurements |
|  | Carrying Amount as of |  |  | As of December 31, 2023 |
|  | December 31, 2023 |  |  | Level 1 |  |  | Level 2 |  |  | Level 3 |
Money market funds |  | $ | 45,130 |  |  | $ | 45,130 |  |  | $ | — |  |  | $ | — |
Investments in employee deferred compensation trusts |  |  | 41 |  |  |  | 41 |  |  |  | — |  |  |  | — |
Preferred stock derivative liability |  |  | 29,947 |  |  |  | — |  |  |  | — |  |  |  | 29,947 |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] | The following tables provide a reconciliation of the beginning and ending balances of liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) (in thousands):
Preferred stock derivative liability |  | 2024 |  |  | 2023 |
Balance, January 1, |  | $ | 29,947 |  |  | $ | 21,918 |
Change in fair value |  |  | — |  |  |  | (147 | )
Extinguishment through redemption of preferred stock |  |  | (29,947 | ) |  |  | — |
Balance, March 31, |  | $ | — |  |  | $ | 21,771 |
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis, Valuation Techniques [Table Text Block] | The following table provides quantitative information of liabilities measured at fair value and the significant unobservable inputs (Level 3), the range of the significant unobservable inputs, and the valuation techniques.
|  | Fair Value As of December 31, 2023 |  | Valuation Technique |  | Unobservable Inputs |  | Range (Weighted Average) |
|  | (In thousands) |  |  |  |  |  |  |
Preferred Stock Derivative Liability |  | $ | 29,947 |  | Discounted Cash Flow |  | Change-in-control probability assumptions |  | Range: 0% to 100% |
|  |  |  |  |  |  | Timing of change-in-control assumptions |  | Range: 1 to 10 years |
|  |  |  |  |  |  | Discount Rate |  | Range: 8% to 10% |
|  |  |  |  |  |  | Market yield* |  | 6.3%* |
*Represents the hypothetical market yield

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- Definition Tabular disclosure of input and valuation technique used to measure fair value and change in valuation approach and technique used to measure similar asset in prior period by class of asset or liability on non-recurring basis. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb) -SubTopic 10 -Topic 820 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
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- Definition Tabular disclosure of the fair value measurement of liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and gains or losses recognized in other comprehensive income (loss) and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs) by class of liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c) -SubTopic 10 -Topic 820 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-3 + Details
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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
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