Income Taxes (Details 2) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Deferred Tax Assets
Net operating loss carryovers	$ 488	$ 8,070
Deferred revenue		1,448
Fixed assets		6
Accrued compensation	18	67
Reserves	201	229
Intangible assets	4,173	557
Other	201	18
Total deferred tax assets	5,081	10,395
Less: valuation allowance	(5,081)	(10,395)
Deferred tax assets, net of valuation allowance	$ 0	$ 0