CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($)	6 Months Ended
	Jul. 03, 2021	Jun. 27, 2020
Operating Activities
Net income	$ 1,381,491	$ 1,007,036
Less: Loss from discontinued operations	(7,067,665)	(3,715,973)
Income from continuing operations	8,449,156	4,723,009
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	3,531,159	3,212,648
Unrecognized pension and postretirement benefits	(1,722,275)	(962,094)
(Gain) on sale of equipment and other assets	(1,555,983)	(424,211)
Provision for doubtful accounts	73,097	156,286
Stock compensation expense	680,014	448,669
Changes in operating assets and liabilities:
Accounts receivable	(3,343,695)	2,949,581
Inventories	(5,763,475)	(2,379,330)
Prepaid expenses and other	(3,057,099)	420,134
Other assets	(143,156)	734,790
Accounts payable	6,047,550	256,484
Accrued compensation	(144,509)	(1,527,149)
Other accrued expenses	1,215,384	(1,057,698)
Net cash provided by operating activities	4,266,168	6,551,119
Investing Activities
Marketable securities	(171)	8,389
Business disposition	0	1,178,601
Issuance of notes receivable	0	(1,251,943)
Payments received from notes receivable	629,912	0
Proceeds from sale of equipment	2,044,338	445,212
Purchases of property, plant and equipment	(1,810,434)	(830,077)
Net cash provided by/used in investing activities	863,645	(449,818)
Financing Activities
Principal payments on long-term debt	(2,336,564)	(2,622,745)
Financing leases, net	169,765	0
Purchase common stock for treasury	0	(368,864)
Dividends paid	(1,375,509)	(1,372,673)
Net cash used in financing activities	(3,542,308)	(4,364,282)
Discontinued Operations
Cash provided by operating activities	1,261,868	805,880
Cash used in investing activities	(571,945)	(153,342)
Cash provided by discontinued operations	689,923	652,538
Effect of exchange rate changes on cash	147,050	(400,006)
Net change in cash and cash equivalents	2,424,478	1,989,551
Cash and cash equivalents at beginning of period	16,101,635	14,883,954
Cash and cash equivalents at end of period ?	18,526,113	16,873,505
Supplemental disclosure of cash flow information:
Interest	1,264,023	1,400,035
Income taxes	284,075	209,100
Non-cash investing and financing activities
Right of use asset	(484,797)	(299,567)
Lease liability	$ 315,032	$ 299,567