CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($)	3 Months Ended		6 Months Ended
	Jul. 01, 2017	Jul. 02, 2016	Jul. 01, 2017	Jul. 02, 2016
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) [Abstract]
Net income	$ 1,466,402	$ 2,087,837	$ 2,983,543	$ 2,735,910
Other comprehensive income/(loss):
Change in foreign currency translation	411,852	(257,653)	883,823	(79,866)
Change in marketable securities, net of tax benefit of: 2017 - $5,553 and $6,345, respectively 2016 - $ -	11,620	0	10,169	0
Change in fair value of derivative financial instrument, net of income tax benefit $41,680	(68,005)	0	(68,005)	0
Change in pension and postretirement benefit costs, net of taxes of: 2017 - $225,727 and $112,864 respectively 2016 - $488,081 and $721,248, respectively	206,683	1,313,187	413,366	(888,656)
Total other comprehensive income	562,150	(1,570,840)	1,239,353	(968,522)
Comprehensive income	$ 2,028,552	$ 516,997	$ 4,222,896	$ 1,767,388