Income Taxes - Tax Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Schedule of Income Tax Rate Reconciliation [Line Items]
Document Fiscal Year Focus	2018
Computed expected tax expense (benefit)	$ (584)	$ 1,190	$ 933
State income tax, net of federal benefit	636	108	56
Valuation allowance	(392)	(1,512)	(1,239)
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount	0	9,737	0
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount	1,067	0	0
All other items	(205)	304	97
Federal Income Tax Expense (Benefit), Continuing Operations	$ 522	$ (9,647)	$ (153)