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Stock-based compensation (Tables) | 6 Months Ended
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Mar. 28, 2020
Share-based Payment Arrangement [Abstract] |
Schedule of stock option activity | The summary of the Company’s stock option activity is as follows:
| Number of Options |  | Weighted Average Exercise Price |  | Weighted Average Remaining Contractual Term |  | Aggregate Intrinsic Value
|  |  |  |  | (In years) |  | (In thousands)
Outstanding at September 29, 2019 | 37,155,568 |  |  | $ | 11.39 |  |  | 6.3 |  | $ | 94,288 |
Granted | — |  |  |  |  |  |  |  |
Exercised | (2,186,674 | ) |  |  |  |  |  |  |
Forfeited | (892,262 | ) |  |  |  |  |  |  |
Outstanding at March 28, 2020 | 34,076,632 |  |  | $ | 11.67 |  |  | 5.9 |  | $ | 34,439 |
At March 28, 2020 |  |  |  |  |  |  |
Options exercisable | 26,650,301 |  |  | $ | 10.94 |  |  | 5.4 |  | $ | 34,439 |
Options vested and expected to vest | 33,117,267 |  |  | $ | 11.59 |  |  | 5.9 |  | $ | 34,439 |
Schedule of restricted stock unit activity | The summary of the Company’s unvested RSU activity is as follows:
| Number of Units |  | Weighted Average Grant Date Fair Value |  | Aggregate Intrinsic Value
|  |  |  |  | (In thousands)
Unvested at September 29, 2019 | 6,716,786 |  |  | $ | 11.40 |  |  | $ | 90,744 |
Granted | 1,572,617 |  |  |  |  |
Vested | (923,636 | ) |  |  |  |
Forfeited | (382,429 | ) |  |  |  |
Unvested at March 28, 2020 | 6,983,338 |  |  | $ | 11.99 |  |  | $ | 60,196 |
At March 28, 2020 |  |  |  |  |
Units expected to vest | 5,648,433 |  |  | $ | 12.00 |  |  | $ | 48,689 |
Schedule of stock-based compensation expense | Total stock-based compensation expense by functional category was as follows:
| Three Months Ended |  | Six Months Ended
| March 28, 2020 |  | March 30, 2019 |  | March 28, 2020 |  | March 30, 2019
(In thousands) |  |  |  |  |  |  |
Cost of revenue | $ | 278 |  |  | $ | 218 |  |  | $ | 561 |  |  | $ | 403 |
Research and development | 5,427 |  |  | 4,284 |  |  | 10,543 |  |  | 7,888 |
Sales and marketing | 3,407 |  |  | 3,128 |  |  | 6,948 |  |  | 5,809 |
General and administrative | 4,282 |  |  | 3,456 |  |  | 8,546 |  |  | 6,018 |
Total stock-based compensation expense | $ | 13,394 |  |  | $ | 11,086 |  |  | $ | 26,598 |  |  | $ | 20,118 |

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- Definition Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement. + 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 (h)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5047-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + 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 (c)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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