Income Taxes - Schedule of Reconciliation of Statutory Federal Income Tax Rate to Net Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Income tax at statutory rate	$ (3,339)	$ (2,331)	$ (2,104)
Change in valuation allowance	(8,354)	2,146	3,137
Change in tax rate	9,788
Change in deferreds	(39)		(852)
State tax	536	9	(184)
Mark-to-market on warrants	1,267	178
Other	301	$ (2)	$ 3
Total	$ 160