Consolidated Statements of Stockholders' (Deficit) Equity - USD ($)	Total	Common stock	Additional paid-in capital	Accumulated deficit	Treasury stock	Accumulated other comprehensive loss	Stockholders' equity
Beginning Balance, amount at Dec. 31, 2012		$ 55,616	$ 162,673,833	$ (100,910,119)	$ (46,916,339)	$ (1,650,050)
Exercise of stock awards		421	697,081
Beneficial conversion feature			1,951,266
Shares issued for Series A redeemable convertible preferred stock dividend payment		0	0
Share-based compensation to non-employees		0
Accretion of Series A redeemable convertible preferred stock	$ (127,504)		(127,504)
Dividends on Series A redeemable convertible preferred stock	(216,379)		(216,379)
Share-based compensation to non-employees			37,379
Share-based compensation to employees			1,668,050
Net loss	(10,932,590)			(10,932,590)
Shares received for Estate litigation settlement					0
Purchase of shares					0
Other comprehensive (loss) income, net						(112,337)
Ending Balance, amount at Dec. 31, 2013		56,037	166,683,726	(111,842,709)	(46,916,339)	(1,762,387)	$ 6,218,328
Exercise of stock awards		323	24,361
Beneficial conversion feature			0
Shares issued for Series A redeemable convertible preferred stock dividend payment		0	0
Share-based compensation to non-employees		0
Accretion of Series A redeemable convertible preferred stock	(493,363)		(493,363)
Dividends on Series A redeemable convertible preferred stock	(747,616)		(747,616)
Share-based compensation to non-employees			1,173
Share-based compensation to employees			1,465,010
Net loss	(7,211,821)			(7,211,821)
Shares received for Estate litigation settlement					(5,293,319)
Purchase of shares	(4,685,401)				(4,685,401)
Other comprehensive (loss) income, net						251,097
Ending Balance, amount at Dec. 31, 2014		56,360	166,933,291	(119,054,530)	(56,895,059)	(1,511,290)	(10,471,228)
Exercise of stock awards		354	58,888
Beneficial conversion feature			0
Shares issued for Series A redeemable convertible preferred stock dividend payment		227	385,385
Share-based compensation to non-employees		254
Accretion of Series A redeemable convertible preferred stock	(587,613)		(587,613)
Dividends on Series A redeemable convertible preferred stock	(765,203)		(765,203)
Share-based compensation to non-employees			577,820
Share-based compensation to employees			1,351,303
Net loss	(1,929,361)			(1,929,361)
Shares received for Estate litigation settlement					0
Purchase of shares	$ (137,858)				(137,858)
Other comprehensive (loss) income, net						(191,924)
Ending Balance, amount at Dec. 31, 2015		$ 57,195	$ 167,953,871	$ (120,983,891)	$ (57,032,917)	$ (1,703,214)	$ (11,708,956)