Earnings (Loss) Per Share (Basic and diluted loss per share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Oct. 01, 2022	Jul. 02, 2022	Apr. 02, 2022	Jan. 01, 2022	Oct. 02, 2021	Jul. 03, 2021	Apr. 03, 2021	Dec. 31, 2022	Jan. 01, 2022	Jan. 02, 2021
Numerator for basic loss per share
Loss from continuing operations	$ (871)	$ (11,934)	$ 2,285	$ 1,002					$ (9,518)	$ (1,172)	$ (42,392)
Less: dividends and accretion on preferred stock	(830)	(764)	(760)	(755)	$ (752)	$ (748)	$ (744)	$ (1,953)	(3,109)	(4,197)	(10,328)
Loss from continuing operations attributable to common shareholders									(12,627)	(5,369)	(52,720)
Earnings from discontinued operations									4,677	0	124,820
Earnings (loss) attributable to common shareholders	$ 224	$ (12,698)	$ 711	$ 3,813	$ (6,830)	$ (3,657)	$ 4,787	$ 331	$ (7,950)	$ (5,369)	$ 72,100
Denominator for basic earnings (loss) per share:
Basic weighted-average number of shares outstanding									107,659	104,098	89,234
From continuing operations	$ (0.02)	$ (0.12)	$ 0.01	$ 0					$ (0.12)	$ (0.05)	$ (0.59)
From discontinued operations	$ 0.02	0	(0.01)	0.03					0.04	0	1.4
Earnings (loss) attributable to common shareholders		(0.12)	0.01	0.04	$ (0.06)	$ (0.03)	$ 0.05	$ 0	$ (0.07)	$ (0.05)	$ 0.81
Numerator for diluted earnings (loss) per share:
Loss from continuing operations									$ (9,518)	$ (1,172)	$ (42,392)
Less: dividends and accretion on preferred stock									(3,109)	(4,197)	(10,328)
Loss from continuing operations attributable to common shareholders									(12,627)	(5,369)	(52,720)
Earnings from discontinued operations									4,677	0	124,820
Earnings (loss) attributable to common shareholders									$ (7,950)	$ (5,369)	$ 72,100
Denominator for diluted loss per share
Basic weighted-average number of shares outstanding									107,659	104,098	89,234
Dilutive effect of the following:
Diluted weighted-average number of shares outstanding									107,659	104,098	89,234
From continuing operations									$ (0.12)	$ (0.05)	$ (0.59)
From discontinued operations									0.04	0	1.4
Earnings (loss) attributable to common shareholders		$ (0.12)	$ 0.01	$ 0.04	$ (0.06)	$ (0.03)	$ 0.05	$ 0	$ (0.07)	$ (0.05)	$ 0.81
Series A Preferred Stock [Member]
Dilutive effect of the following:
Diluted weighted-average number of shares outstanding									0	0	0
Series B-1 Preferred Stock [Member]
Dilutive effect of the following:
Diluted weighted-average number of shares outstanding									0	0	0
Stock options and restricted stock units [Member]
Dilutive effect of the following:
Diluted weighted-average number of shares outstanding									0	0	0