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Income Taxes - Components of Deferred Tax Asset (Detail) - USD ($) $ in Thousands | Sep. 30, 2020 | Sep. 30, 2019
--- | --- | ---
Deferred tax assets: |  |
Inventories | $ 808 | $ 774
Operating lease right-of-use assets | 9,926 |
Accrued expenses | 640 | 492
Stock based compensation | 2,170 | 2,388
Tax loss carryforwards | 810 | 2,316
Other | 268 | 562
Valuation allowance |  | (164)
Total long-term deferred tax assets | 14,622 | 6,368
Deferred tax liabilities: |  |
Depreciation and amortization | (9,095) | (7,510)
Operating lease liabilities | (10,036) |
Total long-term deferred tax liabilities | (19,131) | (7,510)
Net deferred tax liabilities | $ (4,509) | $ (1,142)

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