Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating Loss Carryforwards [Line Items]
Federal net operating losses for income tax	$ (3,000)	$ (12,200)
Deferred Tax Assets, Operating Loss Carryforwards	$ 5,523	2,010
Deferred tax asset related to state net operating loss carry-forwards		$ 2,000
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	21.00%	35.00%
State
Operating Loss Carryforwards [Line Items]
Federal net operating losses for income tax	$ 54,700	$ 60,100