Consolidated Statements of Comprehensive Income (USD $)	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Consolidated Statements of Comprehensive Income [Abstract]
Net income	$ 6,901,921	$ 8,625,800	$ 5,504,930
Other comprehensive income/(loss) -
Change in foreign currency translation	(656,972)	533,291	(341,488)
Change in pension and postretirement benefit costs, net of income taxes (expense)/benefit of ($3,437,175) in 2013, $2,053,255 in 2012 and $2,507,762 in 2011	6,254,558	(3,712,466)	(4,607,131)
Total other comprehensive income/(loss)	5,597,586	(3,179,175)	(4,948,619)
Comprehensive income	$ 12,499,507	$ 5,446,625	$ 556,311