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v3.23.2

Summary of Available-for-Sale Securities (Detail) - USD ($) | Jun. 30, 2023 | Dec. 31, 2022 | Jun. 30, 2022
--- | --- | --- | ---
Schedule of Available-for-sale Securities [Line Items] |  |  |
Amortized Cost | $ 71,675,000 | $ 83,828,000 |
Gross Unrealized Gain | 6,000 | 50,000 |
Gross Unrealized Loss | (2,341,000) | (2,837,000) |
Allowance for Credit Loss | 0 | 0 | $ 0
Fair Value | 69,340,000 | 81,041,000 |
Money market funds |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Amortized Cost | 5,472,000 | 14,472,000 |
Gross Unrealized Gain |  | 0 |
Gross Unrealized Loss |  | 0 |
Allowance for Credit Loss |  | 0 |
Fair Value | 5,472,000 | 14,472,000 |
United States government agency securities |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Amortized Cost | 27,159,000 | 27,200,000 |
Gross Unrealized Gain |  | 41,000 |
Gross Unrealized Loss | (708,000) | (818,000) |
Allowance for Credit Loss |  | 0 |
Fair Value | 26,451,000 | 26,423,000 |
Corporate debt securities |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Amortized Cost | 35,541,000 | 38,496,000 |
Gross Unrealized Gain |  | 2,000 |
Gross Unrealized Loss | (1,333,000) | (1,703,000) |
Allowance for Credit Loss |  | 0 |
Fair Value | 34,208,000 | 36,795,000 |
Mortgage-backed securities |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Amortized Cost | 3,503,000 | 3,660,000 |
Gross Unrealized Gain | 6,000 | 7,000 |
Gross Unrealized Loss | (300,000) | (316,000) |
Allowance for Credit Loss |  | 0 |
Fair Value | $ 3,209,000 | $ 3,351,000 |

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