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Income Taxes (Details 1) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Current deferred tax assets:    
Vacation accrual $ 26 $ 21
Total current deferred tax assets 26 21
Valuation allowance (26) (21)
Net current deferred tax assets      
Noncurrent deferred tax assets:    
Net operating loss carryforwards 37,295 35,751
Charitable contribution carryforwards 368 406
Research and experimentation credits 687 687
Capitalized intangibles 3,413 3,432
Stock based compensation 416 399
Depreciation and amortization 11 23
Other 25 76
Total noncurrent deferred tax assets 42,215 40,774
Valuation allowance (42,215) (40,774)
Net noncurrent deferred tax assets      
Deferred tax liabilities:    
Current deferred tax liabilities      
Noncurrent deferred tax liabilities      
Net deferred tax liabilities      
Net noncurrent deferred tax assets