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Income Taxes (Components of Deferred Tax Assets (Liabilities)) (Details) - USD ($)
$ in Thousands
Sep. 30, 2018
Sep. 30, 2017
Gross deferred tax assets:    
Deferred compensation $ 1,253 $ 1,976
Reserves and accruals 4,794 5,017
Accrued tool sets 638 1,111
Deferred revenue 9,185 27,056
Deferred rent liability 189 455
Net operating loss carryovers 5,389 416
Depreciation and amortization of property and equipment 3,740 3,151
Charitable contribution carryovers 804 665
Deductions limited by Section 382 700 943
Valuation allowance (23,112) (38,407)
Total deferred tax assets, net 3,580 2,383
Gross deferred tax liabilities:    
Amortization of goodwill and intangibles (2,056) (3,141)
Prepaid expenses deductible for tax (1,853) (2,383)
Total deferred tax liabilities, gross (3,909) (5,524)
Total deferred tax liabilities, net $ (329) $ (3,141)