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, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Tax Expense Benefit Continuing Operations Income Tax Reconciliation [Abstract]
Income tax, at federal rate	$ 209	$ 123	$ 692	$ 559
State and local tax, net of federal taxes	(455)	(246)	(707)	(430)
Valuation allowance, net of the federal benefit	506	304	887	588
Other	27	7	95	(94)
Provision for income taxes	$ 287	$ 188	$ 967	$ 623