CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($)	9 Months Ended
	Sep. 30, 2017	Oct. 01, 2016
Operating Activities
Net income	$ 5,214,024	$ 5,135,974
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	3,230,174	2,795,699
Unrecognized pension and postretirement benefits	74,839	952,205
Loss on sale of equipment and other assets	18,585	45,313
Provision for doubtful accounts	52,663	0
Issuance of Common Stock for directors' fees	130,547	112,086
Changes in operating assets and liabilities:
Accounts receivable	(3,894,569)	(1,626,625)
Inventories	2,267,945	2,665,002
Prepaid expenses and other	(2,686,763)	78,914
Other assets	494,750	(67,324)
Accounts payable	1,466,401	(366,454)
Accrued compensation	(172,509)	(215,313)
Other accrued expenses	3,978,256	(526,930)
Net cash provided by operating activities	10,174,343	8,982,547
Investing Activities
Marketable securities	(366,554)	0
Business Acquisition, net of cash acquired	(42,148,000)	0
Purchases of property, plant and equipment	(1,457,641)	(1,819,894)
Net cash used in investing activities	(43,972,195)	(1,819,894)
Financing Activities
Proceeds from issuance of long-term debt	31,000,000	0
Proceeds from short term borrowings	6,614,611	0
Payments on revolving credit note	(1,614,611)	0
Principal payments on long-term debt	(2,173,214)	(1,071,428)
Dividends paid	(2,065,607)	(2,063,085)
Net cash provided by (used in) financing activities	31,761,179	(3,134,513)
Effect of exchange rate changes on cash	505,388	(203,066)
Net change in cash and cash equivalents	(1,531,285)	3,825,074
Cash and cash equivalents at beginning of period	22,725,376	17,814,986
Cash and cash equivalents at end of period	$ 21,194,091	$ 21,640,060