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Consolidated Statements of Cash Flow - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Aug. 03, 2019 | Jul. 28, 2018 | Jul. 29, 2017
Cash Flows from Operating Activities |  |  |
Net income | $ 36,881 | $ 44,900 | $ (594)
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Deferred income taxes | (8,203) | 6,588 | (6,728)
Remeasurement of preferred stock warrant liability | 0 | (10,685) | 18,881
Inventory reserves | 7,974 | 1,916 | 3,591
Compensation expense related to certain stock sales by current and former employees | 0 | 0 | 9,699
Stock-based compensation expense | 35,256 | 15,403 | 3,545
Excess tax benefit related to stock-based compensation expense | 0 | 0 | (62)
Depreciation, amortization, and accretion | 14,331 | 10,542 | 7,655
Loss on disposal of property and equipment | 148 | 155 | 0
Change in operating assets and liabilities: |  |  |
Inventory | (41,233) | (19,416) | (26,375)
Prepaid expenses and other assets | (16,831) | (17,307) | (7,596)
Accounts payable | 10,774 | 35,502 | 7,841
Accrued liabilities | 22,856 | (3,595) | 17,748
Deferred revenue | 3,325 | 1,720 | 2,719
Gift card liability | 825 | 1,624 | 1,993
Other liabilities | 12,491 | 4,831 | 6,307
Net cash provided by operating activities | 78,594 | 72,178 | 38,624
Cash Flows from Investing Activities |  |  |
Purchases of property and equipment | (30,825) | (16,565) | (17,130)
Purchases of securities available-for-sale | (285,205) | 0 | 0
Sales of securities available-for-sale | 10,596 | 0 | 0
Maturities of securities available-for-sale | 80,250 | 0 | 0
Net cash used in investing activities | (225,184) | (16,565) | (17,130)
Cash Flows from Financing Activities |  |  |
Proceeds from initial public offering, net of underwriting discounts paid | 0 | 129,046 | 0
Proceeds from the exercise of stock options, net | 13,693 | 6,384 | 2,346
Payments for tax withholding related to vesting of restricted stock units | (6,748) | (596) | 0
Excess tax benefit related to stock-based compensation expense | 0 | 0 | 62
Repurchase of Class B common stock related to early exercised options | 0 | (39) | (3,557)
Payment of deferred offering costs | 0 | 0 | (1,879)
Net cash provided by (used in) financing activities | 6,945 | 134,795 | (3,028)
Net increase (decrease) in cash, cash equivalents, and restricted cash | (139,645) | 190,408 | 18,466
Effect of exchange rate changes on cash | 211 | 0 | 0
Cash, cash equivalents, and restricted cash at beginning of period | 310,366 | 119,958 | 101,492
Cash, cash equivalents, and restricted cash at end of period | 170,932 | 310,366 | 119,958
Components of Cash, Cash Equivalents, and Restricted Cash |  |  |
Total cash, cash equivalents, and restricted cash | 170,932 | 310,366 | 101,492
Supplemental Disclosure |  |  |
Cash paid for income taxes | 966 | 10,071 | 28,023
Supplemental Disclosure of Non-Cash Investing and Financing Activities: |  |  |
Purchases of property and equipment included in accounts payable and accrued liabilities | 5,272 | 795 | 111
Capitalized stock-based compensation | 1,789 | 883 | 164
Vesting of early exercised options | 209 | 988 | 891
Conversion of preferred stock upon initial public offering | 0 | 42,222 | 0
Reclassification of preferred stock warrant liability upon initial public offering | 0 | 15,994 | 0
Deferred offering costs included in accrued liabilities | 0 | 0 | 508
Deferred offering costs paid in prior year | $ 0 | $ 1,879 | $ 0

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- Definition The cash outflow to reacquire common stock during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585 + Details
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- Definition Amount of cash outflow to satisfy grantee's tax withholding obligation for award under share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585 + Details
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