Accumulated Other Comprehensive Loss (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated other comprehensive (loss) income, beginning balance	$ (1,762,387)	$ (1,650,050)
Other comprehensive (loss) income
Other comprehensive income (loss) before reclassifications	242,310	(120,061)
Amounts reclassified from accumulated other comprehensive income (loss)	8,787	7,724
Total other comprehensive income (loss)	251,097	(112,337)
Accumulated other comprehensive (loss) income, ending balance	(1,511,290)	(1,762,387)
Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated other comprehensive (loss) income, beginning balance	(1,693,905)	(1,601,138)
Other comprehensive (loss) income
Other comprehensive income (loss) before reclassifications	157,410	(92,767)
Amounts reclassified from accumulated other comprehensive income (loss)	0	0
Total other comprehensive income (loss)	157,410	(92,767)
Accumulated other comprehensive (loss) income, ending balance	(1,536,495)	(1,693,905)
Net Unrealized Gains (Losses) On Marketable Securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated other comprehensive (loss) income, beginning balance	3,410	6,210
Other comprehensive (loss) income
Other comprehensive income (loss) before reclassifications	(844)	(1,974)
Amounts reclassified from accumulated other comprehensive income (loss)	(3,974)	(826)
Total other comprehensive income (loss)	(4,818)	(2,800)
Accumulated other comprehensive (loss) income, ending balance	(1,408)	3,410
Net Minimum Pension Liability
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated other comprehensive (loss) income, beginning balance	(71,892)	(55,122)
Other comprehensive (loss) income
Other comprehensive income (loss) before reclassifications	85,744	(25,320)
Amounts reclassified from accumulated other comprehensive income (loss)	12,761	8,550
Total other comprehensive income (loss)	98,505	(16,770)
Accumulated other comprehensive (loss) income, ending balance	$ 26,613	$ (71,892)