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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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