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Income Taxes (Details 1) - USD ($)
$ in Thousands
Sep. 30, 2016
Sep. 30, 2015
Current deferred income tax asset:    
Net operating loss carryforwards and tax credits $ 0 $ 391
Accrued liabilities 0 753
Valuation allowance 0 (162)
Net current deferred tax asset 0 982
Deferred income tax asset (liability):    
Net operating loss carry forwards and tax credits 12,387 12,341
AMT credit carryforward 231 183
Stock based compensation 172 767
Fixed and intangible assets (2,580) (2,379)
Accrued expenses 918 0
Other items, net 287 5
Valuation allowance 0 (1,592)
Net deferred tax asset $ 11,415 $ 9,325