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Leases - Schedule of Maturities of Lease Liabilities for the Company's Operating and Finance Leases (Detail) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | --- | ---
Leases [Abstract] |  |  |
2022 (remaining nine months) | $ 315 | $ 326 |
2023 | 428 | 332 |
2024 | 440 | 341 |
2025 | 440 | 282 |
2026 | 355 | 180 |
Thereafter | 15 | 0 |
Total lease payments | 1,993 | 1,461 |
Less: imputed interest | (344) | (241) |
Total operating lease liabilities | 1,649 | 1,220 | $ 1,414
2022 (remaining nine months) | 30 | 40 |
2023 | 40 | 40 |
2024 | 40 | 40 |
2025 | 7 | 7 |
2026 | 0 | 0 |
Thereafter | 0 | 0 |
Total lease payments | 117 | 127 |
Less: imputed interest | (10) | (13) |
Present value of lease liabilities | 107 | 114 | $ 145
2022 (remaining nine months) | 345 | 366 |
2023 | 468 | 372 |
2024 | 480 | 381 |
2025 | 447 | 289 |
2026 | 355 | 180 |
Thereafter | 15 | 0 |
Total lease payments | 2,110 | 1,588 |
Less: imputed interest | (354) | (254) |
Present value of lease liabilities | $ 1,756 | $ 1,334 |

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