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Equity Plans (Tables) | 12 Months Ended
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Aug. 30, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Schedule of Option Activity | Option activity for 2018 is summarized as follows:
|  | Number of Shares |  | Weighted-Average Exercise Price Per Share |  | Weighted-Average Remaining Contractual Life (In Years) |  | Aggregate Intrinsic Value
Outstanding as of August 31, 2017 |  | 33 |  |  | $ | 19.32 |  |  |  |  |
Granted |  | 2 |  |  | 43.30 |  |  |  |  |
Exercised |  | (16 | ) |  | 17.82 |  |  |  |  |
Canceled or expired |  | (1 | ) |  | 22.67 |  |  |  |  |
Outstanding as of August 30, 2018 |  | 18 |  |  | 23.38 |  |  | 4.8 |  | $ | 527 |
Exercisable as of August 30, 2018 |  | 8 |  |  | $ | 21.66 |  |  | 3.2 |  | $ | 233 |
Unvested as of August 30, 2018 |  | 10 |  |  | 24.61 |  |  | 6.0 |  | 294 |
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 |  | 2018 |  | 2017 |  | 2016
Stock options granted |  | 2 |  |  | 8 |  |  | 8 |
Weighted-average grant-date fair value per share |  | $ | 18.65 |  |  | $ | 8.68 |  |  | $ | 6.94 |
Average expected life in years |  | 5.5 |  |  | 5.5 |  |  | 5.5 |
Weighted-average expected volatility |  | 44 | % |  | 46 | % |  | 47 | %
Weighted-average risk-free interest rate |  | 2.2 | % |  | 1.8 | % |  | 1.7 | %
Expected dividend yield |  | 0.0 | % |  | 0.0 | % |  | 0.0 | %
Schedule of Restricted Stock Awards Activity | Restricted Stock Awards activity for 2018 is summarized as follows:
|  | Number of Shares |  | Weighted-Average Grant Date Fair Value Per Share
Outstanding as of August 31, 2017 |  | 19 |  |  | $ | 19.78 |
Granted |  | 4 |  |  | 42.48 |
Restrictions lapsed |  | (6 | ) |  | 21.70 |
Canceled |  | (2 | ) |  | 21.93 |
Outstanding as of August 30, 2018 |  | 15 |  |  | 25.18 |
For the year ended |  | 2018 |  | 2017 |  | 2016
Restricted stock award shares granted |  | 4 |  |  | 8 |  |  | 10 |
Weighted-average grant-date fair value per share |  | $ | 42.48 |  |  | $ | 18.77 |  |  | $ | 15.40 |
Aggregate vesting-date fair value of shares vested |  | $ | 259 |  |  | $ | 115 |  |  | $ | 71 |
Employee Stock Purchase Plan Valuation Assumptions | Assumptions used in the Black-Scholes option valuation model for the offering period beginning August 1, 2018 were as follows:
Weighted-average grant-date fair value per share | $ | 14.55 |
Average expected life in years | 0.5 |
Weighted-average expected volatility | 43 | %
Weighted-average risk-free interest rate | 2.2 | %
Expected dividend yield | 0.0 | %
Stock-based Compensation Expense by Caption |
For the year ended |  | 2018 |  | 2017 |  | 2016
Stock-based compensation expense by caption |  |  |  |  |  |
Cost of goods sold |  | $ | 83 |  |  | $ | 88 |  |  | $ | 76 |
Selling, general, and administrative |  | 61 |  |  | 75 |  |  | 66 |
Research and development |  | 54 |  |  | 52 |  |  | 49 |
|  | $ | 198 |  |  | $ | 215 |  |  | $ | 191 |
Stock-based compensation expense by type of award |  |  |  |  |  |
Stock options |  | $ | 55 |  |  | $ | 71 |  |  | $ | 79 |
Restricted stock awards |  | 140 |  |  | 144 |  |  | 112 |
ESPP |  | 3 |  |  | — |  |  | — |
|  | $ | 198 |  |  | $ | 215 |  |  | $ | 191 |

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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + 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 (d) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=109197908&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 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=109197908&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=109197908&loc=d3e5070-113901 + Details
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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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