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Income Taxes - Components of Net Deferred Tax Assets (Details) - USD ($)
$ in Thousands
Aug. 03, 2019
Jul. 28, 2018
Jul. 29, 2017
Deferred tax assets:      
Inventory reserve and uniform capitalization $ 11,696 $ 7,504 $ 13,378
Deferred rent 232 202 4,858
Accruals and reserves 6,623 8,274 6,215
Research and development credits 4,778 754 0
Stock-based compensation 6,195 2,210 308
Deferred revenue 713 739 616
Other 302 404 175
Gross deferred tax assets 30,539 20,087 25,550
Deferred tax liabilities:      
Depreciation and amortization (8,275) (5,860) (5,407)
Other (89) (120) (152)
Gross deferred tax liabilities (8,364) (5,980) (5,559)
Net deferred tax assets $ 22,175 $ 14,107 $ 19,991