Income Taxes - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended			36 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2018
Income Tax Disclosure [Line Items]
Tax Cuts and Jobs Act, income tax expense	$ 0	$ 5,476	$ 0
Cumulative pre-tax income (loss) from continuing operations	(8,104)	1,944	(2,774)	$ (8,934)
Net operating losses	6,028			6,028
Deferred tax benefit to reverse valuation allowance	(147)	(357)	(47)
Work Opportunity Tax Credit
Income Tax Disclosure [Line Items]
Employment tax credit	64	$ 210	$ 550
IRS
Income Tax Disclosure [Line Items]
Operating loss carryforwards limited by change in ownership provisions	$ 1,162			$ 1,162