Significant Accounting Policies (Schedule of consolidated statements of operations) (Details) - USD ($) $ / shares in Units, $ 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
Consolidated Statements of Operations
Revenues	$ 221,293	$ 229,665	$ 243,531	$ 240,173	$ 204,232	$ 198,479	$ 202,273	$ 207,640	$ 934,662	$ 812,624	$ 789,213
Cost of goods sold	193,076	198,282	208,633	211,817	186,193	175,123	175,937	177,651	811,808	714,904	680,136
Gross profit	28,217	31,383	34,898	28,356	18,039	23,356	26,336	29,989	122,854	97,720	109,077
Selling, general and administrative expenses	22,144	20,654	24,304	22,210	16,518	16,487	22,720	20,874	89,312	76,599	89,463
Intangible asset amortization	2,446	2,612	2,612	2,612	2,612	2,612	2,532	2,194	10,282	9,950	8,946
Other expense, net	105	20,200	1,540	287	1,442	1,172	4,661	1,615	22,132	8,890	23,393
Foreign exchange loss (gain)	(1,622)	473	(127)	(472)	579	336	(639)	836	(1,748)	1,112	(1,640)
Earnings (loss) from continuing operations before the following	5,144	(12,556)	6,569	3,719	(3,112)	2,749	(2,938)	4,470	2,876	1,169	(11,085)
Interest expense, net	4,730	4,342	3,132	2,530	2,624	2,854	1,631	1,660	14,734	8,769	30,042
Loss on retirement of debt									0	0	8,915
Loss from continuing operations before income taxes	414	(16,898)	3,437	1,189	(5,736)	(105)	(4,569)	2,810	(11,858)	(7,600)	(50,042)
Income tax benefit	1,285	(4,964)	1,152	187	342	2,804	(10,100)	526	(2,340)	(6,428)	(7,650)
Earnings (loss) from continuing operations	(871)	(11,934)	2,285	1,002					(9,518)	(1,172)	(42,392)
Earnings from discontinued operations	1,925	0	(814)	3,566					4,677	0	124,820
Net earnings (loss)	1,054	(11,934)	1,471	4,568	(6,078)	(2,909)	5,531	2,284	(4,841)	(1,172)	82,428
Dividends and accretion on preferred stock	(830)	(764)	(760)	(755)	(752)	(748)	(744)	(1,953)	(3,109)	(4,197)	(10,328)
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
Basic and diluted earnings (loss) per share
Earnings (loss) from continuing operations	$ (0.02)	$ (0.12)	$ 0.01	$ 0					$ (0.12)	$ (0.05)	$ (0.59)
Earnings from discontinued operations	0.02	0	(0.01)	0.03					0.04	0	1.4
Earnings (loss) attributable to common shareholders (Basic)		(0.12)	0.01	0.04	$ (0.06)	$ (0.03)	$ 0.05	$ 0	(0.07)	(0.05)	0.81
Earnings (loss) attributable to common shareholders (Diluted)		$ (0.12)	$ 0.01	$ 0.04	$ (0.06)	$ (0.03)	$ 0.05	$ 0	$ (0.07)	$ (0.05)	$ 0.81
As Previously Reported [Member]
Consolidated Statements of Operations
Revenues		$ 229,665	$ 243,531	$ 240,173	$ 204,232	$ 198,479	$ 202,273	$ 207,640		$ 812,624	$ 789,213
Cost of goods sold		198,282	208,633	212,182	185,828	175,123	175,937	177,651		714,539	680,136
Gross profit		31,383	34,898	27,991	18,404	23,356	26,336	29,989		98,085	109,077
Selling, general and administrative expenses		20,654	24,304	21,935	16,793	16,487	22,720	20,874		76,874	89,463
Intangible asset amortization		2,612	2,612	2,612	2,612	2,612	2,532	2,194		9,950	8,946
Other expense, net		20,200	1,540	287	1,442	1,172	4,661	1,615		8,890	23,393
Foreign exchange loss (gain)		473	(127)	(472)	579	336	(639)	836		1,112	(1,640)
Earnings (loss) from continuing operations before the following		(12,556)	6,569	3,629	(3,022)	2,749	(2,938)	4,470		1,259	(11,085)
Interest expense, net		4,342	3,132	2,530	2,624	2,854	1,631	1,660		8,769	30,042
Loss on retirement of debt										0	8,915
Loss from continuing operations before income taxes		(16,898)	3,437	1,099	(5,646)	(105)	(4,569)	2,810		(7,510)	(50,042)
Income tax benefit		(4,259)	939	445	(3,782)	2,929	(3,651)	1,138		(3,366)	(2,740)
Earnings (loss) from continuing operations		(12,639)	2,498	654						(4,144)	(47,302)
Earnings from discontinued operations		0	(814)	3,566						0	124,820
Net earnings (loss)		(12,639)	1,684	4,220	(1,864)	(3,034)	(918)	1,672		(4,144)	77,518
Dividends and accretion on preferred stock		(764)	(760)	(755)	(752)	(748)	(744)	(1,953)		(4,197)	(10,328)
Earnings (loss) attributable to common shareholders		$ (13,403)	$ 924	$ 3,465	$ (2,616)	$ (3,782)	$ (1,662)	$ (281)		$ (8,341)	$ 67,190
Basic and diluted earnings (loss) per share
Earnings (loss) from continuing operations		$ (0.12)	$ 0.02	$ 0						$ (0.08)	$ (0.65)
Earnings from discontinued operations		0	(0.01)	0.03						0	1.4
Earnings (loss) attributable to common shareholders (Basic)		(0.12)	0.01	0.03	$ (0.02)	$ (0.04)	$ (0.02)	$ 0		(0.08)	0.75
Earnings (loss) attributable to common shareholders (Diluted)		$ (0.12)	$ 0.01	$ 0.03	$ (0.02)	$ (0.04)	$ (0.02)	$ (0)		$ (0.08)	$ 0.75
Adjustment [Member]
Consolidated Statements of Operations
Revenues		$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0		$ 0	$ 0
Cost of goods sold		0		(365)	365	0	0	0		365
Gross profit		0	0	365	(365)	0	0	0		(365)	0
Selling, general and administrative expenses		0	0	275	(275)	0	0	0		(275)	0
Intangible asset amortization		0	0	0	0	0	0	0		0	0
Other expense, net		0	0	0	0	0	0	0		0	0
Foreign exchange loss (gain)		0	0	0	0	0	0	0		0	0
Earnings (loss) from continuing operations before the following		0	0	90	(90)	0	0	0		(90)	0
Interest expense, net		0	0	0	0	0	0	0		0	0
Loss on retirement of debt										0	0
Loss from continuing operations before income taxes		0	0	90	(90)	0	0	0		(90)	0
Income tax benefit		(705)	213	(258)	4,124	(125)	(6,449)	(612)		(3,062)	(4,910)
Earnings (loss) from continuing operations		705	(213)	348						2,972	4,910
Earnings from discontinued operations		0	0	0						0	0
Net earnings (loss)		705	(213)	348	(4,214)	125	6,449	612		2,972	4,910
Dividends and accretion on preferred stock		0	0	0	0	0	0	0		0	0
Earnings (loss) attributable to common shareholders		$ 705	$ (213)	$ 348	$ (4,214)	$ 125	$ 6,449	$ 612		$ 2,972	$ 4,910
Basic and diluted earnings (loss) per share
Earnings (loss) from continuing operations		$ 0.01	$ 0	$ 0						$ 0.03	$ 0.06
Earnings from discontinued operations		0	0	0						0	0
Earnings (loss) attributable to common shareholders (Basic)	0	0.01	0	0	$ (0.04)	$ 0	$ 0.06	$ 0.01		0.03	0.06
Earnings (loss) attributable to common shareholders (Diluted)	$ 0	$ 0.01	$ 0	$ 0	$ (0.04)	$ 0	$ 0.06	$ 0.01		$ 0.03	$ 0.06