Income Taxes (Details 2) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Deferred tax assets:
Net operating loss carryforwards	$ 5,730	$ 4,732
Deferred Revenue	194	453
Depreciation and amortization	30	18
Stock-based compensation	1,089	1,105
Accrual and reserves	117	132
Research and Development Credits	96	130
Total gross deferred tax assets	7,256	6,570
Less valuation allowance	(7,256)	(6,570)
Net deferred tax assets