Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Deferred tax assets, net
Net operating loss carryforwards	$ 32,253	$ 29,919
Net operating loss carryforwards of foreign subsidiaries	374	374
Book over tax depreciation	(43)	(41)
Stock-based compensation expense	577	490
Other	116	130
Deferred tax assets	33,277	30,872
Valuation allowance for deferred tax assets	(33,277)	(30,872)
Deferred tax assets, net of allowance	0
Reconciliation of income tax benefit to statutory rate:
Income tax (benefit) at statutory rate	212	(84)
State income taxes, net of federal income tax benefit	4
Changes in state net operating loss carryforwards		(2)
Permanent differences	8	9
True-up prior year NOL	(8)	213
Change in valuation allowance	2,405	(138)
Change in state tax rate	(2,605)
Other	(16)	2
Income tax benefit	$ 0