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Income Taxes - Components of Deferred Tax Assets and Liabilities (Detail) (USD $) In Thousands, unless otherwise specified | Sep. 30, 2014 | Sep. 30, 2013
--- | --- | ---
Current deferred tax assets: |  |
Inventories | $ 1,712 | $ 1,494
Accrued expenses | 1,110 | 1,269
Current deferred tax assets | 2,822 | 2,763
Valuation allowance | (2,822) | (2,763)
Net current deferred tax assets | 0 | 0
Long-term deferred tax assets: |  |
Depreciation and amortization | 6,008 | 8,275
Stock based compensation | 3,902 | 4,216
Tax loss carryforwards | 24,418 | 26,726
Other | 374 | 364
Long-term deferred tax assets | 34,702 | 39,581
Valuation allowance | (34,702) | (39,581)
Net long-term deferred tax assets | $ 0 | $ 0

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