Accumulated Other Comprehensive Loss (Details) - USD ($)	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated other comprehensive (loss) income, beginning balance	$ (11,708,956)
Other comprehensive (loss) income
Other comprehensive (loss) income before reclassifications	(220,975)	$ (21,699)
Amounts reclassified from accumulated other comprehensive (loss) income	775	1,684
Total other comprehensive loss, net of applicable taxes:	(220,200)	(20,015)
Accumulated other comprehensive (loss) income, ending balance	(15,402,630)
Accumulated Other Comprehensive loss, net
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated other comprehensive (loss) income, beginning balance	(1,703,214)	(1,511,290)
Other comprehensive (loss) income
Accumulated other comprehensive (loss) income, ending balance	(1,923,414)	(1,531,305)
Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated other comprehensive (loss) income, beginning balance	(1,726,994)	(1,536,495)
Other comprehensive (loss) income
Other comprehensive (loss) income before reclassifications	(227,415)	(26,501)
Amounts reclassified from accumulated other comprehensive (loss) income	0	0
Total other comprehensive loss, net of applicable taxes:	(227,415)	(26,501)
Accumulated other comprehensive (loss) income, ending balance	(1,954,409)	(1,562,996)
Net Unrealized (Losses) Gains on Marketable Securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated other comprehensive (loss) income, beginning balance	(3,406)	(1,408)
Other comprehensive (loss) income
Other comprehensive (loss) income before reclassifications	4,467	3,991
Amounts reclassified from accumulated other comprehensive (loss) income	(428)	28
Total other comprehensive loss, net of applicable taxes:	4,039	4,019
Accumulated other comprehensive (loss) income, ending balance	633	2,611
Net Minimum Pension Liability
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated other comprehensive (loss) income, beginning balance	27,186	26,613
Other comprehensive (loss) income
Other comprehensive (loss) income before reclassifications	1,973	811
Amounts reclassified from accumulated other comprehensive (loss) income	1,203	1,656
Total other comprehensive loss, net of applicable taxes:	3,176	2,467
Accumulated other comprehensive (loss) income, ending balance	$ 30,362	$ 29,080