Leases - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Leases [Abstract]
Operating lease term	5 years
Operating lease ROU assets	$ 5,816,000		$ 6,254,000
Operating lease liabilities	8,292,000
Cash paid for lease liabilities for operating leases	700,000
Right-of-use assets obtained in exchange for operating lease obligations	0
Operating lease obligations	0
Sublease income	$ 100,000	$ 0
Weighted average remaining operating lease term	3 years 11 months 19 days
Weighted average discount rate	8.60%