Consolidated Statements of Comprehensive Income - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Consolidated Statements Of Comprehensive Income
Net income	$ 4,793,525	$ 4,789,005
Other comprehensive loss -
Foreign currency translation	(830,867)	(858,118)
Change in net prior service credit and actuarial losses, net of income tax expense	(52,825)	(104,459)
Total other comprehensive loss	(883,692)	(962,577)
Comprehensive income	$ 3,909,833	$ 3,826,428