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Stock-Based Compensation (Tables) | 12 Months Ended
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Dec. 27, 2020
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |
Summary of Stock Options Activity Under Plans and Agreement | A summary of stock option activity is as follows:
Options |  | Shares (Thousands) |  |  | Weighted Average Exercise Price |  |  | Aggregate Intrinsic Value (Thousands) |  |  | Weighted Average Remaining Term (Years) |
Outstanding—December 31, 2017 |  |  | 3,309 |  |  | $ | 10.71 |  |  | $ | 7,699 |  |  |  | 4.90 |
Granted |  |  | 203 |  |  |  | 11.27 |  |  |  |  |  |  |  |  |
Exercised |  |  | (993 | ) |  |  | 8.30 |  |  |  |  |  |  |  |  |
Canceled |  |  | (369 | ) |  |  | 13.63 |  |  |  |  |  |  |  |  |
Outstanding—December 30, 2018 |  |  | 2,150 |  |  | $ | 11.49 |  |  | $ | 378 |  |  |  | 5.13 |
Granted |  |  | — |  |  |  | — |  |  |  |  |  |  |  |  |
Exercised |  |  | (22 | ) |  |  | 7.93 |  |  |  |  |  |  |  |  |
Canceled |  |  | (354 | ) |  |  | 12.45 |  |  |  |  |  |  |  |  |
Outstanding—December 29, 2019 |  |  | 1,774 |  |  | $ | 11.34 |  |  | $ | — |  |  |  | 4.33 |
Granted |  |  | — |  |  |  | — |  |  |  |  |  |  |  |  |
Exercised |  |  | — |  |  |  | — |  |  |  |  |  |  |  |  |
Canceled |  |  | (541 | ) |  |  | 12.84 |  |  |  |  |  |  |  |  |
Outstanding—December 27, 2020 |  |  | 1,233 |  |  | $ | 10.68 |  |  | $ | — |  |  |  | 2.49 |
Exercisable—December 27, 2020 |  |  | 1,217 |  |  | $ | 10.65 |  |  | $ | — |  |  |  | 2.43 |
Schedule of Average Assumptions to Value Options | There were no stock option grants in 2020 and 2019. The following table reflects the average assumptions utilized in the Black-Scholes option-pricing model to value the options granted for 2018:
|  |  |  |  |  | 2018 |
Risk-free interest rate |  |  |  |  |  |  |  | 3.0 | %
Expected life (years) |  |  |  |  |  |  |  | 6.25 |
Expected dividend yield |  |  |  |  |  |  |  | — |
Volatility |  |  |  |  |  |  |  | 35.0 | %
Weighted average grant date fair value |  |  |  |  |  |  | $ | 4.52 |
Summary of RSU Activity | A summary of RSU activity is as follows:
RSUs |  |  | Number of RSUs (Thousands) |  |  | Weighted Average Fair Value per Share |
Non-vested as of December 31, 2017 |  |  |  | 267 |  |  | $ | 11.79 |
Granted |  |  |  | 131 |  |  |  | 12.12 |
Vested |  |  |  | (121 | ) |  |  | 11.92 |
Canceled |  |  |  | (30 | ) |  |  | 11.05 |
Non-vested as of December 30, 2018 |  |  |  | 247 |  |  | $ | 11.99 |
Granted |  |  |  | 402 |  |  |  | 6.47 |
Vested |  |  |  | (135 | ) |  |  | 11.94 |
Canceled |  |  |  | (51 | ) |  |  | 8.48 |
Non-vested as of December 29, 2019 |  |  |  | 463 |  |  | $ | 7.59 |
Granted |  |  |  | 1,604 |  |  |  | 2.79 |
Vested |  |  |  | (231 | ) |  |  | 2.87 |
Canceled |  |  |  | (842 | ) |  |  | 3.65 |
Non-vested as of December 27, 2020 |  |  |  | 994 |  |  | $ | 3.35 |
Summary of PSU Activity | A summary of activity for PSUs with market vesting conditions is as follows:
PSUs |  |  | Number of PSUs (Thousands) |  |  | Weighted Average Fair Value per Share |
Non-vested as of December 29, 2019 |  |  |  | — |  |  | $ | — |
Granted |  |  |  | 1,475 |  |  |  | 1.43 |
Vested |  |  |  | (501 | ) |  |  | 4.45 |
Canceled |  |  |  | (472 | ) |  |  | 1.50 |
Non-vested as of December 27, 2020 |  |  |  | 502 |  |  | $ | 1.38 |

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