Income Taxes - Deferred Taxes & Tax Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Deferred tax assets, net
Net operating loss carryforwards	$ 31,777	$ 32,103
Net operating loss carryforwards of foreign subsidiaries	374	374
Book over tax depreciation	(62)	(54)
Stock-based compensation expense	25	10
Other	128	125
Deferred tax assets	32,242	32,558
Valuation allowance for deferred tax assets	(32,242)	(32,558)
Deferred tax assets, net of allowance	0	0
Reconciliation of income tax benefit to statutory rate:
Income benefit at statutory rate	(425)	(93)
State income taxes (benefit), net of federal income tax benefit	(28)	49
RTP (ISO expense)	116	508
Permanent differences	65	13
Change in valuation allowance	(316)	(718)
Change in state tax rate	577	241
Other	11
Income tax benefit	$ 0	$ 0