Consolidated Statements of Comprehensive Income (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Consolidated Statements Of Comprehensive Income
Net income	$ 3,549,231	$ 2,811,193
Other comprehensive income (loss) -
Foreign currency translation	194,235	(229,853)
Change in net prior service credit and actuarial losses, net of income tax expense	57,191	66,691
Total other comprehensive income (loss)	251,426	(163,162)
Comprehensive income	$ 3,800,657	$ 2,648,031