Intangible Assets - Summary of Intangible Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Finite Lived Intangible Assets [Line Items]
Trade name	$ 5,871	$ 5,871
Customer relationships	10,644	10,644
Non-compete agreements	157	157
Intangible Assets, gross	16,672	16,672
Less accumulated amortization	(9,554)	(9,338)
Intangible Assets, net	$ 7,118	$ 7,334
Estimated useful life in years	11 years
Customer Relationships [Member]
Finite Lived Intangible Assets [Line Items]
Estimated useful life in years	11 years
Non-compete Agreements [Member]
Finite Lived Intangible Assets [Line Items]
Estimated useful life in years	5 years