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Stock Plans (Tables) | 12 Months Ended
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Dec. 28, 2019
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions | The fair value of each of these option awards is estimated on the date of grant using the Black-Scholes option pricing model with the weighted average assumptions noted in the following table. Expected volatility is based on the historical volatility of the Company’s common stock. Since the Company’s option exercise history is limited, it has estimated the expected term of these options (other than the options with a seven-year term) to be the midpoint between the vesting period and the contractual term of each option. For options with a seven-year contractual term, the expected term is equal to 7 years. The risk-free interest rate is based on the U.S. Treasury yield curve in effect on the date of grant which most closely corresponds to the expected term of the Time-Vesting Options. The dividend yield is based on the Company’s historic average dividend yield.
|  |  | December 30, |
|  |  | 2017 |
Dividend yield |  |  | 0.0% |
Volatility |  |  | 51.3%-51.7% |
Risk-free interest rate |  |  | 2.17% |
Expected term (years) |  |  | 6.0-7.0 |
Summary of Option Activity | A summary of all option activity for the fiscal year ended December 28, 2019 is presented below:
|  |  |  |  |  |  |  |  |  | Weighted- |  |  |  |  |
|  |  |  |  |  | Weighted- |  |  | Average |  |  |  |  |
|  |  |  |  |  | Average |  |  | Remaining |  |  | Aggregate |
|  |  |  |  |  | Exercise |  |  | Contractual |  |  | Intrinsic |
|  | Shares |  |  | Price |  |  | Life (Yrs.) |  |  | Value |
Outstanding at December 29, 2018 |  |  | 3,789 |  |  | $ | 21.69 |  |  |  |  |  |  |  |  |
Granted |  |  | 0 |  |  | $ | 0.00 |  |  |  |  |  |  |  |  |
Exercised |  |  | (74 | ) |  | $ | 11.76 |  |  |  |  |  |  |  |  |
Cancelled |  |  | (15 | ) |  | $ | 49.17 |  |  |  |  |  |  |  |  |
Outstanding at December 28, 2019 |  |  | 3,700 |  |  | $ | 21.77 |  |  |  | 5.3 |  |  | $ | 72,356 |
Exercisable at December 28, 2019 |  |  | 3,050 |  |  | $ | 16.61 |  |  |  | 5.4 |  |  | $ | 71,614 |
Schedule of Share-based Compensation, Restricted Stock Units Award Activity | A summary of RSU activity under the Stock Plans for the fiscal year ended December 28, 2019 is presented below:
|  |  |  |  |  | Weighted-Average |
|  |  |  |  |  | Grant-Date Fair |
|  | Shares |  |  | Value |
Outstanding at December 29, 2018 |  |  | 881 |  |  | $ | 37.91 |
Granted |  |  | 852 |  |  | $ | 19.09 |
Vested |  |  | (387 | ) |  | $ | 31.67 |
Forfeited |  |  | (193 | ) |  | $ | 29.77 |
Outstanding at December 28, 2019 |  |  | 1,153 |  |  | $ | 27.46 |
Schedule of Share-based Compensation, Performance Stock Units Award Activity | The fair value of PSUs is determined using the closing market price of the Company’s common stock on the date of grant. A summary of PSU activity under the 2014 Plan for the fiscal year ended December 28, 2019 is presented below:
|  |  |  |  |  | Weighted-Average |
|  |  |  |  |  | Grant-Date Fair |
|  | Shares |  |  | Value |
Outstanding at December 29, 2018 |  |  | 380 |  |  | $ | 32.56 |
Granted (a) |  |  | 368 |  |  | $ | 17.51 |
Vested |  |  | (219 | ) |  | $ | 13.19 |
Forfeited |  |  | (92 | ) |  | $ | 29.08 |
Outstanding at December 28, 2019 |  |  | 437 |  |  | $ | 30.35 |
(a) | Includes the incremental shares vested with respect to the Company satisfying certain applicable performance vesting criteria for the 2016 PSUs.

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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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- 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=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 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=116856206&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=116856206&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=116856206&loc=d3e5070-113901 + Details
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