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Income Taxes - Components of Deferred Tax Asset (Detail) - USD ($)
$ in Thousands
Sep. 30, 2016
Sep. 30, 2015
Deferred tax assets, net:    
Inventories $ 1,095 $ 1,361
Accrued expenses 919 911
Depreciation and amortization 1,497 5,152
Stock based compensation 3,566 3,776
Tax loss carryforwards 13,879 17,450
Other 573 585
Long-term deferred tax assets 21,529 29,235
Valuation allowance (454) (1,718)
Net long-term deferred tax assets $ 21,075 $ 27,517