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Income Taxes (Details 2) (USD $)
Dec. 31, 2013
Dec. 31, 2012
Deferred tax assets:    
Capitalized research expense $ 2,782,000 $ 3,191,000
Net operating loss carryforwards 48,846,000 43,233,000
Research and development and other tax credits 1,877,000 1,134,000
Other 8,641,000 6,569,000
Deferred Tax Assets, Gross 62,146,000 54,127,000
Valuation allowance (61,061,000) (52,185,000)
Total deferred tax assets 1,085,000 1,942,000
Deferred tax liabilities:    
Acquired intangibles (1,096,000) (1,532,000)
Investment in affiliated entity (123,000) (511,000)
Net deferred tax liabilities $ (134,000) $ (101,000)