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Stock-Based Compensation (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands |  | 12 Months Ended
--- | --- | ---
Jan. 02, 2024 | Dec. 30, 2023 | Dec. 31, 2022 | Jan. 01, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Gross stock-based compensation expense |  | $ 11,800 | $ 13,800 | $ 9,100
Intrinsic value of stock options exercised |  | 700 |  |
Employee share purchase plan |  | $ 583 | $ 575 | $ 583
CEO [Member] | Subsequent Event [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Stock options, Granted | 288,808 |  |  |
Exercise price of stock option to purchase one common share | $ 5.54 |  |  |
Stock Options [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Stock options, Granted |  | 534,657 |  |
Exercise price of stock option to purchase one common share |  | $ 6.29 |  |
Weighted-average grant-date fair value of options |  | $ 3.87 | $ 3.49 | $ 8.1
Compensation costs related to awards not yet recognized |  | $ 2,000 |  |
Vesting period |  | 1 year 4 months 24 days |  |
Expected life of options (years) |  | 6 years | 6 years | 6 years
Employee share purchase plan |  | $ 600 | $ 600 | $ 600
Employee stock purchase plan (in shares) |  | 120,666 | 87,850 | 66,834
Common Shares remained available to be granted |  | 425,566 |  |
Restricted Stock Units ("RSUs") [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Stock options, Granted |  | 443,247 |  |
Weighted-average grant-date fair value of options |  | $ 5.88 | $ 6.4 | $ 13.54
Compensation costs related to awards not yet recognized |  | $ 2,400 |  |
Vesting period |  | 1 year 9 months 18 days |  |
Intrinsic value |  | $ 2,700 |  |
Percentage of vesting awards |  | 100.00% |  |
Restricted Stock Units ("RSUs") [Member] | CEO [Member] | Subsequent Event [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Stock options, Granted | 144,404 |  |  |
Performance Share Units [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Stock options, Granted |  | 1,137,057 |  |
Weighted-average grant-date fair value of options |  | $ 6.96 | 5.45 | 13.9
Compensation costs related to awards not yet recognized |  | $ 2,300 |  |
Vesting period |  | 3 months 18 days |  |
Intrinsic value |  | $ 18,000 |  |
Performance Share Units [Member] | Minimum [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Percentage of vesting awards |  | 0.00% |  |
Performance Share Units [Member] | Maximum [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Percentage of vesting awards |  | 200.00% |  |
Performance Share Units [Member] | Subsequent Event [Member] | Minimum [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Percentage of vesting awards | 0.00% |  |  |
Performance Share Units [Member] | Subsequent Event [Member] | Maximum [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Percentage of vesting awards | 200.00% |  |  |
Performance Share Units [Member] | CEO [Member] | Subsequent Event [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Stock options, Granted | 230,804 |  |  |
Total Shareholder Return Performance Share Units [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Stock options, Granted |  | 405,212 |  |
Weighted-average grant-date fair value of options |  | $ 7 | $ 8.48 | $ 23.4
Compensation costs related to awards not yet recognized |  | $ 2,500 |  |
Vesting period |  | 1 year 9 months 18 days |  |
2013 Plan [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of securities remained available for issuance under the Plan |  | 3,619,054 |  |

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