Consolidated Statements of Comprehensive Income (USD $)	12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Jan. 01, 2011
Consolidated Statements of Comprehensive Income [Abstract]
Net income	$ 8,625,800	$ 5,504,930	$ 5,543,005
Other comprehensive (loss)/income -
Change in foreign currency translation	533,291	(341,488)	752,662
Change in pension and postretirement benefit costs, net of income taxes benefit of $2,053,255 in 2012, $2,507,762 in 2011 and $227,018 in 2010	(3,712,466)	(4,607,131)	(418,175)
Total other comprehensive (loss)/income	(3,179,175)	(4,948,619)	334,487
Comprehensive income	$ 5,446,625	$ 556,311	$ 5,877,492