Nature of Business, Basis of Presentation and Liquidity Risk - Additional Information (Detail) $ in Thousands |
3 Months Ended | 12 Months Ended | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Jul. 31, 2020
shares
|
Dec. 31, 2021
USD ($)
shares
|
Sep. 30, 2021
USD ($)
|
Jun. 30, 2021
USD ($)
|
Mar. 31, 2021
USD ($)
|
Dec. 31, 2020
USD ($)
shares
|
Sep. 30, 2020
USD ($)
|
Jun. 30, 2020
USD ($)
|
Mar. 31, 2020
USD ($)
|
Dec. 31, 2021
USD ($)
shares
|
Dec. 31, 2020
USD ($)
shares
|
Dec. 31, 2019
USD ($)
|
|
| Accounting Policies [Abstract] | ||||||||||||
| Accumulated deficit | $ (93,586) | $ (60,434) | $ (93,586) | $ (60,434) | ||||||||
| Cash and cash equivalents | 43,022 | 35,853 | 43,022 | 35,853 | ||||||||
| Working capital | 40,000 | 40,000 | ||||||||||
| Net loss | $ (7,151) | $ (6,691) | $ (11,311) | $ (7,999) | $ (4,724) | $ (3,764) | $ (2,922) | $ (3,320) | (33,152) | (14,730) | $ (16,395) | |
| Net cash used in operations | $ 29,440 | $ 13,474 | $ 15,216 | |||||||||
| Reverse stock split ratio | 0.05 | |||||||||||
| Common stock, shares authorized | shares | 150,000,000 | 150,000,000 | 150,000,000 | 150,000,000 | 150,000,000 | |||||||