CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Statement of Comprehensive Income [Abstract]
Net loss	$ (1,112,197)	$ (4,296,612)
Other comprehensive loss, net of applicable taxes:
Foreign currency translation	(185,529)	(227,415)
Net unrealized gain on marketable securities	0	4,039
Net minimum pension liability	0	3,176
Total other comprehensive loss, net of applicable taxes:	(185,529)	(220,200)
Total comprehensive loss	(1,297,726)	(4,516,812)
Less: Accrual of Series A redeemable convertible preferred stock dividends	204,575	192,608
Less: Accretion to redemption value of Series A redeemable convertible preferred stock	0	163,669
Total comprehensive loss attributable to common stockholders	$ (1,502,301)	$ (4,873,089)