Income Taxes (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Loss before income taxes:
Domestic loss	$ (2,310,565)	$ (7,638,422)	$ (13,466,322)
Foreign income	756,747	936,692	959,964
Loss before income taxes	(1,553,818)	(6,701,730)	(12,506,358)
Provision (benefit) for income taxes:
Federal	3,939	(843)	(1,823,192)
State and local	16,002	26,145	(209,079)
Foreign	482,242	400,407	348,300
Total	502,183	425,709	(1,683,971)
Deferred:
Federal	(167,634)	14,878	14,875
State and local	7,006	(3,027)	981
Foreign	33,988	72,531	94,347
Total	(126,640)	84,382	110,203
Total provision (benefit) for income taxes	$ 375,543	$ 510,091	$ (1,573,768)