Income Taxes (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Loss before income taxes:
Domestic loss	$ (7,638,422)	$ (13,466,322)	$ (15,356,162)
Foreign income	936,692	959,964	1,158,248
Loss before income taxes	(6,701,730)	(12,506,358)	(14,197,914)
Provision (benefit) for income taxes:
Federal	(843)	(1,823,192)	105,198
State and local	26,145	(209,079)	18,747
Foreign	400,407	348,300	745,812
Total	425,709	(1,683,971)	869,757
Deferred:
Federal	14,878	14,875	14,876
State and local	(3,027)	981	981
Foreign	72,531	94,347	(99,207)
Total	84,382	110,203	(83,350)
Total provision (benefit) for income taxes	$ 510,091	$ (1,573,768)	$ 786,407