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Schedule of Deferred Tax Assets and Liabilities (Details) (USD $) | Dec. 31, 2012 | Dec. 31, 2011
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Income Tax Disclosure [Abstract] |  |
Net operating loss carryforwards | $ 10,902,000 | $ 10,956,000
Credits | 634,000 | 635,000
Capitalized research and development costs | 446,000 | 562,000
Other acquired intangibles | 184,000 | 203,000
Accruals not currently deductible | 1,265,000 | 1,535,000
Total deferred tax assets | 13,431,000 | 13,891,000
Valuation allowance for deferred tax assets | (13,417,395) | (13,882,515)
Net deferred tax assets | 13,605 | 8,485
Deferred tax liability: |  |
Acquired intangibles | (93,000) | (56,000)
Net deferred tax liabilities | $ (79,395) | $ (47,515)

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