Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Current:
Federal	$ 0	$ (1,801)
State and foreign	6	2
Total current	6	(1,799)
Deferred:
Federal and state	0	3,362
Income tax provision	$ 6	$ 1,563