Annual report pursuant to Section 13 and 15(d)

Leases - Components of Lease Expense (Detail)

v3.20.4
Leases - Components of Lease Expense (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Leases [Abstract]    
Operating lease expense $ 2,520 $ 2,175
Variable lease expense 491 456
Total operating lease expense 3,011 2,631
Amortization of right-of-use asset 8 8
Interest on lease liabilities 1 2
Total finance lease expense $ 9 $ 10