Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Valuation allowance	$ 934
Income tax expense (benefit)	1,736	$ (9)
Deferred tax asset net of valuation allowance	3,369	5,400
Changes in valuation allowance	$ 934
Percentage of operating loss carryforward period limited to net income	80.00%
Charitable contribution carryforward [Member]
Federal Loss Carryforwards	$ 400
Expiration Period	2022 years
Retained Earnings	$ 400
Domestic Tax Authority [Member]
Federal Loss Carryforwards	$ 9,900
Expiration Period	2029 years
Operating Loss Carryforwards, Not Subject to Expiration		1,800
Operating Loss Carryforwards, Subject to Expiration		$ 8,100
State and Local Jurisdiction [Member]
Federal Loss Carryforwards	$ 20,200
Expiration Period	2023 years