Consolidated Statements of Shareholders' Equity - 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 Jan. 02, 2021	$ 326,545	$ 37,862	$ (147,741)	$ 1,363	$ 218,029
Balance (in shares) at Jan. 02, 2021	90,194
Exchange of Series A preferred stock, net of share issuance costs of $287	$ 87,188				87,188
Exchange of Series A preferred stock, net of share issuance costs of $287 (in share)	12,633
Employee stock purchase plan	$ 473				473
Employee stock purchase plan (in shares)	46
Stock incentive plans	$ 22,013	(14,992)			7,021
Stock incentive plans (in shares)	4,450
Withholding taxes on stock-based awards		(8,313)			(8,313)
Stock-based compensation		9,593			9,593
Net loss			(2,280)		(2,280)
Dividends on preferred stock			(2,869)		(2,869)
Accretion on preferred stock			(576)		(576)
Balance at Oct. 02, 2021	$ 436,219	24,150	(153,466)	1,363	308,266
Balance (in shares) at Oct. 02, 2021	107,323
Balance at Jul. 03, 2021	$ 435,425	24,966	(149,684)	1,363	312,070
Balance (in shares) at Jul. 03, 2021	107,126
Employee stock purchase plan	$ 140				140
Employee stock purchase plan (in shares)	18
Stock incentive plans	$ 654	(490)			164
Stock incentive plans (in shares)	179
Withholding taxes on stock-based awards		(1,576)			(1,576)
Stock-based compensation		1,250			1,250
Net loss			(3,034)		(3,034)
Dividends on preferred stock			(609)		(609)
Accretion on preferred stock			(139)		(139)
Balance at Oct. 02, 2021	$ 436,219	24,150	(153,466)	1,363	308,266
Balance (in shares) at Oct. 02, 2021	107,323
Balance at Jan. 01, 2022	$ 436,463	23,240	(156,082)	1,363	304,984
Balance (in shares) at Jan. 01, 2022	107,360
Employee stock purchase plan	$ 431				431
Employee stock purchase plan (in shares)	70
Stock incentive plans	$ 2,776	(2,004)			772
Stock incentive plans (in shares)	398
Withholding taxes on stock-based awards		(1,602)			(1,602)
Stock-based compensation		9,691			9,691
Net loss			(6,735)		(6,735)
Dividends on preferred stock			(1,827)		(1,827)
Accretion on preferred stock			(452)		(452)
Balance at Oct. 01, 2022	$ 439,670	29,325	(165,096)	1,363	305,262
Balance (in shares) at Oct. 01, 2022	107,828
Balance at Jul. 02, 2022	$ 438,668	26,254	(151,693)	1,363	314,592
Balance (in shares) at Jul. 02, 2022	107,687
Employee stock purchase plan	$ 152				152
Employee stock purchase plan (in shares)	17
Stock incentive plans	$ 850	(390)			460
Stock incentive plans (in shares)	124
Withholding taxes on stock-based awards		(631)			(631)
Stock-based compensation		4,092			4,092
Net loss			(12,639)		(12,639)
Dividends on preferred stock			(609)		(609)
Accretion on preferred stock			(155)		(155)
Balance at Oct. 01, 2022	$ 439,670	$ 29,325	$ (165,096)	$ 1,363	$ 305,262
Balance (in shares) at Oct. 01, 2022	107,828