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Stock-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2022
Stock-Based Compensation |
Schedule of stock-based compensation costs recognized in the Condensed Consolidated Statements of Income | The following table presents details of stock-based compensation costs recognized in the Consolidated Statements of Income (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended
​ | ​ | December 31, | ​ | January 1, | ​ | January 2,
​ |  | 2022 |  | 2022 |  | 2021
Cost of revenues | ​ | $ | 1,152 | ​ | $ | 964 | ​ | $ | 970
Research and development | ​ |  | 32,860 | ​ |  | 24,986 | ​ |  | 23,359
Selling, general and administrative | ​ |  | 26,498 | ​ |  | 30,892 | ​ |  | 25,125
​ | ​ |  | 60,510 | ​ |  | 56,842 | ​ |  | 49,454
Income tax benefit | ​ |  | (5,980) | ​ |  | (954) | ​ |  | (3,694)
Share-based compensation – continuing operations | ​ | ​ | 54,530 | ​ | ​ | 55,888 | ​ | ​ | 45,760
Share-based compensation – discontinued operations, net | ​ | ​ | — | ​ | ​ | (2,007) | ​ | ​ | 10,715
Total | ​ | $ | 54,530 | ​ | $ | 53,881 | ​ | $ | 56,475
​
Summary of assumptions used to estimate fair values for ESPP | The fair values estimated from the Black-Scholes option-pricing model for ESPP shares granted were calculated using the following assumptions: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended |
​ | ​ | December 31, | ​ | January 1, | ​ | January 2, | ​
Employee Stock Purchase Plan |  | 2022 |  | 2022 |  | 2021 | ​
Expected volatility | ​ | 44 | % | 42 | % | 67 | %
Risk-free interest rate % | ​ | 3.18 | % | 0.05 | % | 0.15 | %
Expected term (in months) | ​ | 9 | ​ | 9 | ​ | 9 | ​
Dividend yield | ​ | — | ​ | — | ​ | — | ​
Summary of assumptions used to estimate fair values for MSUs | The fair values estimated from the Monte Carlo simulation for MSUs were calculated using the following assumptions: ​
​ | ​ | ​ | ​
​ | ​ | Year Ended |
​ | ​ | January 2, | ​
MSUs |  | 2021 |
Expected volatility |  | 36 | %
Risk-free interest rate % |  | 1.3 | %
Expected term (in years) |  | 2.9 | ​
Dividend yield |  | — | ​
Summary of stock-based compensation activity, options | A summary of stock-based compensation activity with respect to fiscal 2022 follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Weighted- | ​ | Weighted-Average | ​ | Aggregate
​ | ​ | ​ | ​ | Average | ​ | Remaining | ​ | Intrinsic
​ | ​ | Shares | ​ | Exercise | ​ | Contractual Term | ​ | Value
Stock Options |  | (000s) |  | Price |  | (In Years) |  | (000s)
Outstanding at January 1, 2022 |  | 118 | ​ | $ | 38.80 |  | 4.12 | ​ | $ | 19,825
Outstanding at December 31, 2022 |  | 118 | ​ | $ | 38.80 |  | 3.12 | ​ | $ | 11,457
Vested at December 31, 2022 and expected to vest |  | 118 | ​ | $ | 38.80 |  | 3.12 | ​ | $ | 11,457
Exercisable at December 31, 2022 |  | 118 | ​ | $ | 38.80 |  | 3.12 | ​ | $ | 11,457
Summary of stock-based compensation activity, RSAs and RSUs | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ | Weighted- | ​ | Weighted-Average | ​ | Aggregate
​ | ​ | ​ | ​ | Average | ​ | Remaining | ​ | Intrinsic
​ | ​ | Shares | ​ | Grant Date | ​ | Vesting Term | ​ | Value
RSAs and RSUs |  | (000s) |  | Fair Value |  | (In Years) |  | (000s)
Outstanding at January 1, 2022 |  | 831 | ​ | $ | 117.25 | ​ | ​ | ​ | ​ | ​
Granted |  | 487 | ​ | $ | 144.40 | ​ | ​ | ​ | ​ | ​
Vested or issued |  | (378) | ​ | $ | 110.12 | ​ | ​ | ​ | ​ | ​
Cancelled or forfeited |  | (43) | ​ | $ | 134.92 | ​ | ​ | ​ | ​ | ​
Outstanding at December 31, 2022 |  | 897 | ​ | $ | 134.74 |  | 1.18 | ​ | $ | 121,668
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Outstanding at December 31, 2022 and expected to vest |  | 825 | ​ | $ | 134.22 |  | 1.18 | ​ | $ | 111,979
Summary of stock-based compensation activity, PSUs and MSUs | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Weighted- |  | Weighted-Average | ​ | Aggregate
​ | ​ | ​ | ​ | Average | ​ | Remaining | ​ | Intrinsic
​ | ​ | Shares | ​ | Grant Date | ​ | Vesting Term | ​ | Value
PSUs and MSUs |  | (000s) |  | Fair Value |  | (In Years) |  | (000s)
Outstanding at January 1, 2022 |  | 246 |  | $ | 105.77 | ​ | ​ | ​ | ​ | ​
Granted |  | 52 | ​ | $ | 160.97 | ​ | ​ | ​ | ​ | ​
Vested or issued |  | — | ​ | $ | — | ​ | ​ | ​ | ​ | ​
Cancelled or forfeited |  | (73) | ​ | $ | 54.77 | ​ | ​ | ​ | ​ | ​
Outstanding at December 31, 2022 |  | 225 | ​ | $ | 134.93 |  | 1.27 | ​ | $ | 30,599
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Outstanding at December 31, 2022 and expected to vest |  | 329 |  | $ | 138.15 |  | 1.27 | ​ | $ | 44,604
Summary of weighted average fair value at the date of grant | The following summarizes the Company’s weighted average fair value at the date of grant: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended
​ | ​ | December 31, | ​ | January 1, | ​ | January 2,
​ |  | 2022 |  | 2022 |  | 2021
Per grant of RSAs and RSUs | ​ | $ | 144.40 |  | $ | 135.28 |  | $ | 100.27
Per grant of PSUs and MSUs | ​ | $ | 160.97 |  | $ | 145.11 |  | $ | 98.58
Summary of stock-based payment and stock option values | The following summarizes the Company’s stock-based payment and stock option values (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended
​ | ​ | December 31, | ​ | January 1, | ​ | January 2,
​ |  | 2022 |  | 2022 |  | 2021
Intrinsic value of stock options exercised | ​ | $ | — | ​ | $ | 986 | ​ | $ | 558
Intrinsic value of RSUs that vested | ​ | $ | 57,621 | ​ | $ | 76,654 | ​ | $ | 48,534
Grant date fair value of RSUs that vested | ​ | $ | 41,610 | ​ | $ | 47,726 | ​ | $ | 37,477
Intrinsic value of PSUs and MSUs that vested | ​ | $ | — | ​ | $ | 5,231 | ​ | $ | 8,545
Grant date fair value of PSUs and MSUs that vested | ​ | $ | — | ​ | $ | 3,562 | ​ | $ | 6,302
Summary of shares reserved of common stock for future issuance | As of December 31, 2022, the Company had reserved shares of common stock for future issuance as follows (in thousands): ​
​ | ​ | ​
2009 Plan |  | 2,520
2009 ESPP |  | 1,145
Total shares reserved |  | 3,665

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- Definition Disclosure of the number and weighted-average grant date fair value for performance share units and market based-stock units that were outstanding at the beginning and end of the year, and the number of market-based stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of equity instruments other than options, including, but not limited to: (a) expected term of 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 No definition available. + Details
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- Definition Tabular disclosure of the weighted-average grant-date fair value of restricted stock awards, restricted stock units and market stock units granted during the year. + References No definition available. + Details
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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 https://asc.fasb.org/extlink&oid=128089324&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 https://asc.fasb.org/extlink&oid=128089324&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 https://asc.fasb.org/extlink&oid=128089324&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 https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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