Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Deferred tax assets, net
Net operating loss carryforwards	$ 29,919	$ 30,094
Net operating loss carryforwards of foreign subsidiaries	374	374
Book over tax depreciation	(41)	(30)
Intangible assets		40
Stock-based compensation expense	490	412
Other	130	121
Deferred tax assets	30,872	31,011
Valuation allowance for deferred tax assets	(30,872)	(31,011)
Deferred tax assets, net of allowance	0
Reconciliation of income tax benefit to statutory rate:
Income tax benefit at statutory rate	(84)	(317)
State income taxes, net of federal income tax benefit		2
Changes in state net operating loss carryforwards	(2)	10
Permanent differences	9	5
True-up prior year NOL	213
Change in valuation allowance	(138)	277
Other	2	23
Income tax benefit	$ 0