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Income Taxes - Components of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands | Sep. 30, 2015 | Sep. 30, 2014
--- | --- | ---
Current deferred tax assets: |  |
Inventories | $ 1,361 | $ 1,712
Accrued expenses | 911 | 1,110
Tax loss carryforwards | 7,560 |
Current deferred tax assets | 9,832 | 2,822
Valuation allowance | (578) | (2,822)
Net current deferred tax assets | 9,254 |
Long-term deferred tax assets: |  |
Depreciation and amortization | 5,152 | 6,008
Stock based compensation | 3,776 | 3,902
Tax loss carryforwards | 9,890 | 24,418
Other | 585 | 374
Long-term deferred tax assets | 19,403 | 34,702
Valuation allowance | (1,140) | $ (34,702)
Net long-term deferred tax assets | $ 18,263 |

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