Quarterly report pursuant to Section 13 or 15(d)

Commitments - Lease Cost (Detail)

v3.21.2
Commitments - Lease Cost (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Disclosure of Lease of Cost [Abstract]        
Operating lease cost $ 154 $ 154 $ 461 $ 461
Variable lease costs 46 43 111 89
Total lease cost $ 200 $ 197 $ 572 $ 550