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Schedule of Deferred Tax Assets and Liabilities (Details) (USD $)
Dec. 31, 2012
Dec. 31, 2011
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)