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Equity Plans (Tables) | 12 Months Ended
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Sep. 03, 2020
Share-based Payment Arrangement [Abstract] |
Schedule of Restricted Stock Awards Activity |
| Number of Shares | Weighted-Average Grant Date Fair Value Per Share
Outstanding as of August 29, 2019 | 16 |  | $ | 34.72 |
Granted | 8 |  | 46.44 |
Restrictions lapsed | (6) |  | 29.34 |
Canceled | (1) |  | 40.59 |
Outstanding as of September 3, 2020 | 17 |  | 42.13 |
For the year ended | 2020 |  |  |  | 2019 |  |  |  | 2018 |  |  |
Restricted stock award shares granted | 8 |  |  |  | 9 |  |  |  | 4 |  |  |
Weighted-average grant-date fair value per share | $ | 46.44 |  |  |  |  | $ | 41.11 |  |  |  |  | $ | 42.48 |  |  |  |
Aggregate vesting-date fair value of shares vested | $ | 294 |  |  |  |  | $ | 248 |  |  |  |  | $ | 259 |  |  |  |
Employee Stock Purchase Plan Valuation Assumptions |
For the year ended | 2020 |  |  |  | 2019 |  |  |  | 2018 |  |
Weighted-average grant-date fair value per share | $ | 14.24 |  |  |  |  | $ | 11.60 |  |  |  |  | $ | 14.55 |  |  |
Average expected life in years | 0.5 |  |  |  | 0.5 |  |  |  | 0.5 |  |
Weighted-average expected volatility | 45.0 | % |  |  |  | 45.0 | % |  |  |  | 43.0 | % |  |
Weighted-average risk-free interest rate | 0.8 | % |  |  |  | 2.2 | % |  |  |  | 2.2 | % |  |
Expected dividend yield | 0.0 | % |  |  |  | 0.0 | % |  |  |  | 0.0 | % |  |
Stock Options Granted and Valuation Assumptions | Stock options granted and assumptions used in the Black-Scholes option valuation model were as follows:
For the year ended |  |  |  |  | 2019 |  |  |  | 2018 |  |
Stock options granted |  |  |  |  | — |  |  |  |  | 2 |  |  |
Weighted-average grant-date fair value per share |  |  |  |  | $ | 19.50 |  |  |  |  | $ | 18.65 |  |  |
Average expected life in years |  |  |  |  | 5.4 |  |  |  | 5.5 |  |
Weighted-average expected volatility |  |  |  |  | 44.0 | % |  |  |  | 44.0 | % |  |
Weighted-average risk-free interest rate |  |  |  |  | 2.9 | % |  |  |  | 2.2 | % |  |
Expected dividend yield |  |  |  |  | 0.0 | % |  |  |  | 0.0 | % |  |
Stock-based Compensation Expense |
For the year ended | 2020 | 2019 | 2018
Stock-based compensation expense by caption |  |  |
Cost of goods sold | $ | 139 |  | $ | 102 |  | $ | 83 |
Selling, general, and administrative | 103 |  | 73 |  | 61 |
Research and development | 86 |  | 68 |  | 54 |
| $ | 328 |  | $ | 243 |  | $ | 198 |
Stock-based compensation expense by type of award |  |  |
Restricted stock awards | $ | 272 |  | $ | 178 |  | $ | 140 |
ESPP | 39 |  | 32 |  | 3 |
Stock options | 17 |  | 33 |  | 55 |
| $ | 328 |  | $ | 243 |  | $ | 198 |

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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of employee stock purchase plans, including, but not limited to: (a) expected term, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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