Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Contingency [Line Items]
Federal statutory rate (percent)	21.00%
Provisional (benefit) amount recorded		$ (740,000)	$ 22,000,000.0
Valuation allowance related to deferred tax assets	$ 3,450,000	3,449,000
Impairment of joint venture	0	0	$ 13,200,000
Tax benefit that would result if uncertain tax positions are reversed	486,000
State and Local Jurisdiction
Income Tax Contingency [Line Items]
Net operating loss carryforward	197,000,000.0
Valuation allowance related to deferred tax assets	$ 3,500,000	$ 3,400,000