Income Taxes (Details 3) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Deferred Tax Asset
Net operating loss carryovers	$ 4,892	$ 5,458
Deferred revenue		1,486
Stock based compensation	646	490
Debt debenture		412
Research credits	133	139
Accrued compensation	55	98
Reserves	191	512
Intangibles	1,741
Other	470	976
Total Deferred Tax Asset	8,128	9,571
Less: valuation allowance	(7,677)	(8,660)
Deferred Tax Asset, Net of Valuation Allowance	451	911
Deferred Tax Liabilities
Intangible assets		(463)
Fixed assets
Other	(36)
Prepaid maintenance		(1)
Capitalized research	(415)	(447)
Total deferred tax liabilities	(451)	(911)
Net Deferred Tax Asset (Liability)