CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($)	3 Months Ended
	Mar. 28, 2020	Mar. 30, 2019
Operating Activities
Net income	$ 2,895,817	$ 1,570,960
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	2,055,782	1,438,799
Unrecognized pension and postretirement benefits	(678,305)	207,816
(Gain)/loss on sale of equipment and other assets	(437,446)	671,138
Provision for doubtful accounts	156,286	25,711
Stock compensation expense	238,293	104,992
Changes in operating assets and liabilities:
Accounts receivable	(2,273,864)	(2,123,227)
Inventories	(994,546)	1,313,875
Prepaid expenses and other	341,582	(81,231)
Other assets	(415,415)	101,919
Accounts payable	2,766,829	(27,186)
Accrued compensation	(1,585,976)	(1,724,968)
Other accrued expenses	(564,572)	11,718
Net cash provided by operating activities	1,504,465	1,490,316
Investing Activities
Marketable securities	11,151	(91,400)
Capitalized software	0	(104,484)
Proceeds from sale of equipment	445,212	0
Purchases of property, plant and equipment	(828,115)	(743,622)
Net cash used in investing activities	(371,752)	(939,506)
Financing Activities
Principal payments on long-term debt	(1,221,423)	(387,500)
Purchase common stock for treasury	(368,864)	0
Dividends paid	(686,614)	(686,740)
Net cash used in financing activities	(2,276,901)	(1,074,240)
Effect of exchange rate changes on cash	(343,436)	144,954
Net change in cash and cash equivalents	(1,487,624)	(378,476)
Cash and cash equivalents at beginning of period	17,996,505	13,925,765
Cash and cash equivalents at end of period	16,508,881	13,547,289
Non-cash investing and financing activities
Right of use asset	(489,822)
Lease liability	$ 489,822