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Income Taxes (Components of Deferred Tax Assets (Liabilities)) (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Sep. 30, 2018
Gross deferred tax assets:    
Deferred compensation $ 1,449 $ 1,253
Accrued compensation 2,432 2,662
Accrued tool sets 694 638
Reserves and accruals 1,884 2,132
Deferred revenue 4,324 10,148
Deferred rent liability 3,024 3,479
Deferred tax assets, financing obligation 10,178 10,508
Net operating loss carryovers 12,639 5,159
Tax credit carryforwards 205 230
Charitable contribution carryovers 1,234 804
Deductions limited by Section 382 670 700
Valuation allowance (25,673) (23,112)
Total deferred tax assets, net 13,060 14,601
Gross deferred tax liabilities:    
Amortization of goodwill and intangibles (2,056) (2,056)
Depreciation and amortization of property and equipment (10,470) (12,011)
Prepaid expenses deductible for tax (863) (863)
Total deferred tax liabilities, gross (13,389) (14,930)
Total deferred tax liabilities, net $ (329) $ (329)