Consolidated Statements of Comprehensive Loss (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Statement of Comprehensive Income [Abstract]
Net loss	$ (10,932,590)	$ (14,984,321)	$ (23,368,283)
Other comprehensive income (loss), net of taxes/benefits:
Foreign currency translation	(92,767)	(152,075)	(279,898)
Net unrealized (loss) gain on marketable securities	(2,800)	90,000	20,201
Net minimum pension liability	(16,770)	129,445	67,891
Total other comprehensive (loss) income, net of taxes/benefits:	(112,337)	67,370	(191,806)
Total comprehensive loss	(11,044,927)	(14,916,951)	(23,560,089)
Less: Accrual of preferred stock dividends	216,379	0	0
Less: Accretion to redemption value of Series A preferred stock	127,504	0	0
Total comprehensive loss attributable to common stockholders	$ (11,388,810)	$ (14,916,951)	$ (23,560,089)