Consolidated Statements of Stockholders' Deficit - USD ($)	Total	Common Stock	Additional Paid-In Capital	Accumulated Deficit	Treasury Stock	Accumulated Other Comprehensive Loss, Net
Beginning Balance, amount at Dec. 31, 2014	$ (10,471,228)	$ 56,360	$ 166,933,291	$ (119,054,530)	$ (56,895,059)	$ (1,511,290)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(1,929,361)			(1,929,361)
Exercise of stock awards	59,242	354	58,888
Shares issued for Series A redeemable convertible preferred stock dividend payment	385,612	227	385,385
Share-based compensation to non-employees	578,074	254	577,820
Share-based compensation to employees	1,351,303		1,351,303
Accretion of Series A redeemable convertible preferred stock	(587,613)		(587,613)
Dividends on Series A redeemable convertible preferred stock	(765,203)		(765,203)
Purchase of shares	(137,858)				(137,858)
Foreign currency translation	(190,499)					(190,499)
Net unrealized gain (loss) on marketable securities	(1,998)					(1,998)
Net minimum pension liability	573					573
Ending Balance, amount at Dec. 31, 2015	(11,708,956)	57,195	167,953,871	(120,983,891)	(57,032,917)	(1,703,214)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(10,998,794)			(10,998,794)
Exercise of stock awards	0	565	(565)
Shares issued for Series A redeemable convertible preferred stock dividend payment	770,790	624	770,166
Share-based compensation to non-employees	1,576,882	1,099	1,575,783
Share-based compensation to employees	751,336		751,336
Accretion of Series A redeemable convertible preferred stock	(1,181,446)		(1,181,446)
Dividends on Series A redeemable convertible preferred stock	(777,890)		(777,890)
Foreign currency translation	(139,394)					(139,394)
Net unrealized gain (loss) on marketable securities	3,406					3,406
Net minimum pension liability	1,489					1,489
Ending Balance, amount at Dec. 31, 2016	$ (21,702,577)	$ 59,483	$ 169,091,255	$ (131,982,685)	$ (57,032,917)	$ (1,837,713)