Income Taxes (Details 1) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Deferred tax assets:
Net operating loss carryforwards	$ 31,935	$ 31,590
Inventory and other allowances	16	28
Charitable contribution carryforwards	5	6
Excess (tax) book depreciation	805	709
Excess (tax) book amortization	69	67
Share-based compensation	1,328	1,396
Other accrued costs	219	225
Total deferred tax assets	34,377	34,021
Less: Valuation allowance	$ (34,377)	$ (34,021)