Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 26, 2020	Dec. 28, 2019	Dec. 29, 2018
CASH FLOWS FROM OPERATING ACTIVITIES
Income (loss) from continuing operations	$ (9,088)	$ 15,619	$ (21,479)
Income (loss) from discontinued operations	(120)	(348)	95
Net income (loss)	(9,208)	15,271	(21,384)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	10,746	11,440	12,653
Benefit for deferred income taxes	(343)	(487)	(537)
Net loss (gain) on property, plant and equipment disposals	41	(25,281)	(1,047)
Impairment of assets	0	0	1,164
Impairment of goodwill and intangibles	0	0	5,545
Stock-based compensation (credit) expense	431	483	(29)
Bad debt expense	90	240	163
Write-off of deferred financing costs	157	0	0
Changes in operating assets and liabilities:
Receivables	(668)	5,164	3,775
Inventories	10,110	9,686	8,462
Prepaids and other current assets	(2,117)	(975)	(535)
Accounts payable and accrued expenses	1,427	(3,678)	(4,198)
Other operating assets and liabilities	2,883	(176)	1,073
NET CASH PROVIDED BY OPERATING ACTIVITIES	13,549	11,687	5,105
CASH FLOWS FROM INVESTING ACTIVITIES
Net proceeds from sales of property, plant and equipment	44	37,205	1,856
Purchase of property, plant and equipment	(1,760)	(4,235)	(4,052)
NET CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES	(1,716)	32,970	(2,196)
CASH FLOWS FROM FINANCING ACTIVITIES
Repayments of Long-term Lines of Credit	(59,693)	(39,524)	1,512
Net borrowings on revolving credit facility	28,352	0	0
Proceeds from Issuance of Debt	25,000	0	0
Repayments of Secured Debt	(343)	(5,475)	(731)
Payments on notes payable related to acquisitions	0	0	(791)
Borrowings on notes payable - equipment and other	1,460	1,379	3,273
Payments on notes payable - equipment and other	(2,380)	(3,375)	(4,260)
Borrowings on finance leases	2,211	11,500	0
Payments on finance leases	(4,756)	(4,166)	(4,617)
Change in outstanding checks in excess of cash	2,094	(3,141)	2,762
Repurchases of Common Stock	(921)	(827)	(58)
Payments for debt issuance costs	(1,706)	(277)	0
NET CASH USED IN FINANCING ACTIVITIES	(10,682)	(43,906)	(2,910)
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	1,151	751	(1)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	769	18	19
CASH AND CASH EQUIVALENTS AT END OF PERIOD	1,920	769	18
SUPPLEMENTAL CASH FLOW INFORMATION:
Right-of-use assets obtained in exchange for new finance lease liabilities	0	52	0
Equipment purchased under capital leases	0	0	223
Equipment purchased under notes payable	1,314	0	0
Right-of-use assets obtained in exchange for new operating lease liabilities	653	18,167	0
Accrued purchases of equipment	$ 0	$ 188	$ 166