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Income Taxes - Company's Net Deferred Tax Assets and Liabilities (Detail) - USD ($)
Sep. 30, 2016
Sep. 30, 2015
Deferred tax assets:    
Net operating loss carryforwards $ 7,095,000 $ 9,825,000
Foreign net operating losses 327,000 258,000
Stock based compensation 2,898,000 2,333,000
AMT credit carryforwards 279,000 149,000
Other, net 320,000 305,000
Research credit carryforwards 44,000 44,000
Total deferred assets 10,963,000 12,914,000
Deferred tax liabilities:    
Intangibles (473,000) (603,000)
Foreign deferred liabilities (356,000) (415,000)
Net deferred tax asset 10,134,000 11,896,000
Valuation allowance for net deferred tax assets (10,163,000) (12,053,000)
Net deferred tax liability $ (29,000) $ (157,000)