Accumulated Other Comprehensive Loss (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 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	$ (334,792)	$ (1,046)	(557,640)	$ (23,909)
Amounts reclassified from accumulated other comprehensive (loss) income	1,026	567	3,674	3,415
Total other comprehensive loss, net of applicable taxes:	(333,766)	(479)	(553,966)	(20,494)
Accumulated other comprehensive (loss) income, ending balance	(18,317,671)		(18,317,671)
Accumulated Other Comprehensive loss, net
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated other comprehensive (loss) income, beginning balance	(1,923,414)	(1,531,305)	(1,703,214)	(1,511,290)
Other comprehensive (loss) income
Accumulated other comprehensive (loss) income, ending balance	(2,257,180)	(1,531,784)	(2,257,180)	(1,531,784)
Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated other comprehensive (loss) income, beginning balance	(1,954,409)	(1,562,996)	(1,726,994)	(1,536,495)
Other comprehensive (loss) income
Other comprehensive (loss) income before reclassifications	(334,161)	(4,477)	(561,576)	(30,978)
Amounts reclassified from accumulated other comprehensive (loss) income	0	0	0	0
Total other comprehensive loss, net of applicable taxes:	(334,161)	(4,477)	(561,576)	(30,978)
Accumulated other comprehensive (loss) income, ending balance	(2,288,570)	(1,567,473)	(2,288,570)	(1,567,473)
Net Unrealized (Losses) Gains on Marketable Securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated other comprehensive (loss) income, beginning balance	633	2,611	(3,406)	(1,408)
Other comprehensive (loss) income
Other comprehensive (loss) income before reclassifications	(81)	1,792	2,513	4,619
Amounts reclassified from accumulated other comprehensive (loss) income	(202)	(1,135)	1,243	57
Total other comprehensive loss, net of applicable taxes:	(283)	657	3,756	4,676
Accumulated other comprehensive (loss) income, ending balance	350	3,268	350	3,268
Net Minimum Pension Liability
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated other comprehensive (loss) income, beginning balance	30,362	29,080	27,186	26,613
Other comprehensive (loss) income
Other comprehensive (loss) income before reclassifications	(550)	1,639	1,423	2,450
Amounts reclassified from accumulated other comprehensive (loss) income	1,228	1,702	2,431	3,358
Total other comprehensive loss, net of applicable taxes:	678	3,341	3,854	5,808
Accumulated other comprehensive (loss) income, ending balance	$ 31,040	$ 32,421	$ 31,040	$ 32,421