Income Taxes - Reconciliation of Differences Between Federal Income Tax Rate and Total Income Tax Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Tax Expense Benefit Continuing Operations Income Tax Reconciliation [Abstract]
Income tax, at federal rate	$ 1,082	$ 209	$ 655	$ 692
State and local tax, net of federal taxes	899	(455)	(3)	(707)
Valuation allowance, net of the federal benefit	(840)	506	145	887
Other	6	27	101	95
Provision for income taxes	$ 1,147	$ 287	$ 898	$ 967