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Income Taxes (Details 1) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012
--- | --- | ---
Current deferred tax assets: |  |
Vacation accrual | $ 27 | $ 26
Total current deferred tax assets | 27 | 26
Valuation allowance | (27) | (26)
Net current deferred tax assets |  |
Noncurrent deferred tax assets: |  |
Net operating loss carryforwards | 39,799 | 37,295
Charitable contribution carryforwards | 371 | 368
Research and experimentation credits | 820 | 687
Capitalized intangibles | 3,351 | 3,413
Stock based compensation | 454 | 416
Depreciation and amortization | 5 | 11
Other |  | 25
Total noncurrent deferred tax assets | 44,800 | 42,215
Valuation allowance | (44,800) | (42,215)
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 |  |

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