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Related Party Transactions - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands |  | 12 Months Ended
--- | --- | ---
Sep. 30, 2021 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Related Party Transaction [Line Items] |  |  |  |
Share-based compensation arrangement by share-based payment award options grants in period gross |  | 1,662,897 |  |
Share-based compensation arrangement by share-based payment award options grants in period Weighted average exercise price |  | $ 0.90 |  |
Meger Services [Member] |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Due to Related Parties |  | $ 142 | $ 0 |
Share-based Payment Arrangement, Option [Member] |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Share-based compensation arrangement by share-based payment award, accelerated vesting, number | 814,272 |  |  |
Non Executive Officers and Board Members [Member] | Share-based Payment Arrangement, Option [Member] |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Share-based compensation arrangement by share-based payment award options grants in period gross |  | 321,777 | 3,347,705 | 1,089,195
Share-based compensation arrangement by share-based payment award options grants in period Weighted average exercise price |  | $ 1.04 | $ 0.86 | $ 0.86
Share Based Compensation Arrangement by Share Based Payment Award Options Granted in Period Fair Value |  | $ 1,266 |  |
Non Executive Officers and Board Members [Member] | Share-based Payment Arrangement, Option [Member] | Minimum [Member] |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Nonvested award cost not yet recognized period for recognition |  | 3 years |  |
Non Executive Officers and Board Members [Member] | Share-based Payment Arrangement, Option [Member] | Maximum [Member] |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Nonvested award cost not yet recognized period for recognition |  | 4 years |  |
Board Members [Member] | Restricted Stock Units (RSUs) [Member] |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Share-based compensation arrangement by share-based payment award non option equity instruments granted |  | 7,398 |  |
Nonvested award cost not yet recognized period for recognition |  | 3 years |  |
dummy |  | $ 55 |  |
Executive [Member] |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Accrued Bonuses |  | 179 | $ 92 |
Executive [Member] | Cash Bonus [Member] |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Related Party Transaction, Amounts of Transaction |  | $ 1,545 |  |
Executive [Member] | Share-based Payment Arrangement, Option [Member] |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Share-based compensation arrangement by share-based payment award, accelerated vesting, number | 814,272 |  |  |
Share-based Payment Arrangement, Accelerated Cost | $ 3,396 |  |  |
Executive or Member of Board of Directors [Member] |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Term Of Employment |  | 5 years |  |
Term Of Employment Ending Month Year |  | 2025-01 |  |

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