Quarterly report pursuant to Section 13 or 15(d)

Property and Equipment, Net - Additional Information (Detail)

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Property and Equipment, Net - Additional Information (Detail) - USD ($)
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Property, Plant and Equipment [Abstract]    
Fully depreciated computer software and hardware equipment and furniture, fixtures and equipment write-off $ 41,000 $ 191,000
Property and equipment additions incurred but not yet paid 275,000 $ 259,000
Impairment of Long-Lived Assets Held-for-use $ 0