Quarterly report pursuant to Section 13 or 15(d)

Supplemental Information - Summary of Certain Statements of Operations Amounts (Detail)

v3.22.1
Supplemental Information - Summary of Certain Statements of Operations Amounts (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]    
Stock-based compensation expenses $ 531 $ (1,450)
Interest expense (10) (360)
Interest income 1 14
Common stock warrants - financing costs amortization (8) 0
Total (17) (346)
Research and Development [Member]    
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]    
Stock-based compensation expenses 30 392
Selling, General, and Administrative [Member]    
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]    
Stock-based compensation expenses $ 501 $ (1,842)