Quarterly report pursuant to Section 13 or 15(d)

Common Stock - Restricted Stock Unit Awards - Additional Information (Detail)

v3.21.2
Common Stock - Restricted Stock Unit Awards - Additional Information (Detail) - Restricted Stock Unit [Member] - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Award vesting period     4 years  
Stock based compensation expense $ 100,000 $ 34,000 $ 200,000 $ 63,000
Total unrecognized compensation expense related to the Company's restricted stock unit awards $ 600,000   $ 600,000  
Weighted-average period, restricted stock awards     1 year 11 months 15 days