Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Common shares [Member]	Additional paid-in capital [Member]	Accumulated deficit [Member]	Accumulated other comprehensive income [Member]	Total
Balance at Dec. 30, 2023	$ 464,169	$ 28,188	$ (338,050)	$ 2,009	$ 156,316
Balance (in shares) at Dec. 30, 2023	115,953
Employee stock purchase plan	$ 342				342
Employee stock purchase plan (in shares)	68
Stock incentive plan	$ 5,737	(5,160)			577
Stock incentive plan (in shares)	861
Withholding taxes on stock-based awards		(2,804)			(2,804)
Stock-based compensation		9,615			9,615
Net earnings			(8,669)		(8,669)
Accretion on preferred stock			(401)		(401)
Balance at Sep. 28, 2024	$ 470,248	29,839	(347,120)	2,009	154,976
Balance (in shares) at Sep. 28, 2024	116,882
Balance at Jun. 29, 2024	$ 469,719	27,816	(340,769)	2,009	158,775
Balance (in shares) at Jun. 29, 2024	116,796
Employee stock purchase plan	$ 99				99
Employee stock purchase plan (in shares)	19
Stock incentive plan	$ 430	(359)			71
Stock incentive plan (in shares)	67
Withholding taxes on stock-based awards		(145)			(145)
Stock-based compensation		2,527			2,527
Net earnings			(6,214)		(6,214)
Accretion on preferred stock			(137)		(137)
Balance at Sep. 28, 2024	$ 470,248	29,839	(347,120)	2,009	154,976
Balance (in shares) at Sep. 28, 2024	116,882
Balance at Dec. 28, 2024	$ 471,792	30,775	(355,982)	2,009	148,594
Balance (in shares) at Dec. 28, 2024	117,103
Repurchase of common shares	$ (659)		(332)		(991)
Repurchase of common shares (shares)	(163)
Employee stock purchase plan	$ 400				400
Employee stock purchase plan (in shares)	56
Stock incentive plan	$ 6,803	(5,077)			1,726
Stock incentive plan (in shares)	1,206
Withholding taxes on stock-based awards		(2,038)			(2,038)
Stock-based compensation		5,316			5,316
Net earnings			9,978		9,978
Accretion on preferred stock			(175)		(175)
Balance at Sep. 27, 2025	$ 478,336	28,976	(346,511)	2,009	162,810
Balance (in shares) at Sep. 27, 2025	118,202
Balance at Jun. 28, 2025	$ 478,064	27,070	(347,327)	2,009	159,816
Balance (in shares) at Jun. 28, 2025	118,439
Repurchase of common shares (shares)	(163)
Employee stock purchase plan	$ 144				144
Employee stock purchase plan (in shares)	16
Stock incentive plan	$ 128	(26)			102
Stock incentive plan (in shares)	(90)
Withholding taxes on stock-based awards		351			(351)
Stock-based compensation		1,581			1,581
Net earnings			816		816
Balance at Sep. 27, 2025	$ 478,336	$ 28,976	$ (346,511)	$ 2,009	$ 162,810
Balance (in shares) at Sep. 27, 2025	118,202