Income Taxes (Details 3) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Current Assets:
Allowance for doubtful accounts	$ 118	$ 6
Inventory reserve	467	157
Accrued expenses	831	1,005
Total current assets	1,416	1,168
Long Term Assets (Liabilities):
Property, plant and equipment	317	348
Intangible assets	(205)	(256)
Tax operating loss carry forwards	10,962	11,283
Tax credit carry forwards	254	291
Non-employee stock options	2,302	1,238
Other	(1)	(7)
Total Long Term Assets (Liabilities)	13,629	12,897
Gross Deferred Tax Asset (Liability)	15,045	14,065
Less Valuation Allowance	(15,250)	(14,309)
Deferred taxes, net	$ (205)	$ (244)