Consolidated Statements of Comprehensive Income - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Consolidated Statements Of Comprehensive Income
Net income	$ 4,598,350	$ 4,052,479
Other comprehensive (loss) gain -
Foreign currency translation	(461,374)	614,741
Change in net prior service credit and actuarial gains, net of income tax expense	37,388	87,461
Total other comprehensive (loss) income	(423,986)	702,202
Comprehensive income	$ 4,174,364	$ 4,754,681