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Taxes (Details 3) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Significant components of the entity's deferred tax assets    
Net operating loss carryforwards $ 46,144 $ 42,399
Depreciation, amortization and impairment of property and equipment 67 1,654
Stock options 1,651 1,451
Accrued expenses 3,373 3,389
Research and development credits 4,530  
Other 82 45
Translation adjustment 660 1,277
Deferred tax assets 56,507 50,215
Valuation allowance for deferred tax assets (56,507) (50,215)
Net deferred taxes