Annual report pursuant to Section 13 and 15(d)

Property and Equipment, Net - Additional Information (Detail)

v3.20.4
Property and Equipment, Net - Additional Information (Detail) - USD ($)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Property, Plant and Equipment [Abstract]    
Fully depreciated computer software and hardware equipment and furniture, fixtures and equipment write-off $ 1,300,000 $ 5,000,000.0
Property and equipment additions incurred but not yet paid 154,000 $ 619,000
Impairment of Long-Lived Assets Held-for-use $ 0