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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)

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