CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($)	3 Months Ended
	Apr. 01, 2017	Apr. 02, 2016
Operating Activities
Net income	$ 1,517,141	$ 648,073
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	955,614	928,136
Unrecognized pension & other postretirement benefits	127,926	851,929
(Gain)/loss on sale of equipment and other assets	33,098	19,780
Provision for doubtful accounts	6,381	0
Issuance of common stock for directors' fees	41,509	39,601
Changes in operating assets and liabilities:
Accounts receivable	(1,719,513)	(339,041)
Inventories	1,689,822	1,254,683
Prepaid expenses and other	(84,755)	(127,991)
Other assets	(35,208)	(19,977)
Accounts payable	901,500	(1,336,219)
Accrued compensation	(1,321,648)	(1,099,262)
Other accrued expenses	279,730	(161,982)
Net cash provided by operating activities	2,391,597	657,730
Investing Activities
Marketable securities	(215,923)	0
Purchases of property, plant and equipment	(487,169)	(338,270)
Net cash used in investing activities	(703,092)	(338,270)
Financing Activities
Principal payments on long-term debt	(357,142)	(714,285)
Dividends paid	(688,340)	(687,439)
Net cash used in financing activities	(1,045,482)	(1,401,724)
Effect of exchange rate changes on cash	212,902	(4,636)
Net change in cash and cash equivalents	855,925	(1,086,900)
Cash and cash equivalents at beginning of period	22,725,376	17,814,986
Cash and cash equivalents at end of period	$ 23,581,301	$ 16,728,086