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Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($)
Dec. 31, 2016
Dec. 31, 2015
Deferred tax assets:    
Net operating loss carryforwards $ 8,111,000 $ 8,833,000
Credits 755,000 753,000
Capitalized research and development costs 9,000 18,000
Other acquired intangibles 49,000 91,000
Accruals not currently deductible 1,343,000 1,614,000
Depreciation 29,000 5,000
Total deferred tax assets 10,296,000 11,309,000
Valuation allowance for deferred tax assets (464,000) (11,279,000)
Net deferred tax assets 9,832,000 30,000
Deferred tax liability:    
Acquired intangibles (243,000) (205,000)
Net deferred tax assets (liabilities) $ 9,589,000 $ (175,000)