CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($)	6 Months Ended
	Jun. 29, 2019	Jun. 30, 2018
Operating Activities
Net income	$ 4,100,733	$ 6,358,672
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	2,391,314	2,314,985
Unrecognized pension and postretirement benefits	448,214	116,578
Loss on restructuring of equipment and other assets	2,208,740	50,348
Provision for doubtful accounts	43,420	201,552
Stock compensation expense	293,726	214,821
Changes in operating assets and liabilities:
Accounts receivable	(1,794,182)	(3,717,778)
Inventories	3,618,303	(2,658,358)
Prepaid expenses and other	(21,533)	(339,385)
Other assets	709,357	(58,426)
Accounts payable	(89,081)	3,712,586
Accrued compensation	(1,307,966)	(1,527,545)
Other accrued expenses	(1,893,440)	946,368
Net cash provided by operating activities	8,707,605	5,614,417
Investing Activities
Marketable securities	(23,136)	0
Business acquisition, net of cash acquired	0	(4,994,685)
Capitalized software	0	(1,444,459)
Purchases of property, plant and equipment	(1,261,942)	(1,236,375)
Net cash used in investing activities	(1,285,078)	(7,675,519)
Financing Activities
Proceeds from short term borrowings	0	7,000,000
Payments on revolving credit note	0	(6,000,000)
Principal payments on long-term debt	(6,275,000)	(775,000)
Dividends paid	(1,373,700)	(1,378,456)
Net cash used in financing activities	(7,648,700)	(1,153,456)
Effect of exchange rate changes on cash	(31,690)	(80,996)
Net change in cash and cash equivalents	(257,863)	(3,295,553)
Cash and cash equivalents at beginning of period	13,925,765	22,275,477
Cash and cash equivalents at end of period	13,667,902	$ 18,979,924
Non-cash investing and financing activities
Right of use asset	10,026,397
Lease liability	$ (10,026,397)