Accumulated Other Comprehensive Loss (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated other comprehensive (loss) income, beginning balance	$ (1,511,290)	$ (1,762,387)
Other comprehensive (loss) income
Other comprehensive (loss) income before reclassifications	(21,699)	(130,799)
Amounts reclassified from accumulated other comprehensive (loss) income	1,684	3,190
Total other comprehensive loss, net of taxes:	(20,015)	(127,609)
Accumulated other comprehensive (loss) income, ending balance	(1,531,305)	(1,889,996)
Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated other comprehensive (loss) income, beginning balance	(1,536,495)	(1,693,905)
Other comprehensive (loss) income
Other comprehensive (loss) income before reclassifications	(26,501)	(126,286)
Amounts reclassified from accumulated other comprehensive (loss) income	0	0
Total other comprehensive loss, net of taxes:	(26,501)	(126,286)
Accumulated other comprehensive (loss) income, ending balance	(1,562,996)	(1,820,191)
Net Unrealized Gains On Marketable Securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated other comprehensive (loss) income, beginning balance	(1,408)	3,410
Other comprehensive (loss) income
Other comprehensive (loss) income before reclassifications	3,991	(1,815)
Amounts reclassified from accumulated other comprehensive (loss) income	28	0
Total other comprehensive loss, net of taxes:	4,019	(1,815)
Accumulated other comprehensive (loss) income, ending balance	2,611	1,595
Net Minimum Pension Liability
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated other comprehensive (loss) income, beginning balance	26,613	(71,892)
Other comprehensive (loss) income
Other comprehensive (loss) income before reclassifications	811	(2,698)
Amounts reclassified from accumulated other comprehensive (loss) income	1,656	3,190
Total other comprehensive loss, net of taxes:	2,467	492
Accumulated other comprehensive (loss) income, ending balance	$ 29,080	$ (71,400)