CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY (USD $)	Total	7.5% Series A-1 Convertible Preferred Stock	Preferred Stock 7.5% Series A-1 Convertible Preferred Stock	Preferred Stock 7.5% Series A-2 Convertible Preferred Stock	Preferred Stock 7.5% Series B Convertible Preferred Stock	Common Stock	Common Stock 7.5% Series A-2 Convertible Preferred Stock	Common Stock 7.5% Series B Convertible Preferred Stock	Additional Paid-in Capital	Additional Paid-in Capital 7.5% Series A-1 Convertible Preferred Stock	Additional Paid-in Capital 7.5% Series A-2 Convertible Preferred Stock	Additional Paid-in Capital 7.5% Series B Convertible Preferred Stock	Accumulated Deficit
BALANCE at Dec. 31, 2011	$ 16,597,675		$ 15	$ 4	$ 20	$ 19,308			$ 143,439,370				$ (126,861,042)
BALANCE, shares at Dec. 31, 2011			22,637	6,672	29,907	28,990,630
Common stock issued for:
Public offering, shares						13,325,521
Public offering	26,549,997					8,875			26,541,122
Public offering issuance costs	(2,858,871)								(2,858,871)
Vested restricted stock, shares						609,500
Vested restricted stock	0					406			(406)
Payment of dividends, shares						2,148,934
Payment of dividends	0					1,431			(1,431)
Purchase of properties, plant, and equipment, shares						170,986
Purchase of properties, plant and equipment	444,700					114			444,586
Payment of long-term debt obligation, shares						31,721
Payment of long-term debt obligation	75,000					21			74,979
Stock-based compensation	5,887,593								5,887,593
Deemed dividend on beneficial conversion	1,242,927								1,242,927
feature related to convertible preferred stock	(1,242,927)								(1,242,927)
Issuance of convertible preferred stock, shares		862.5	862
Issuance of convertible preferred stock		2,466,750	1							2,466,749
Contingent dividend related to convertible preferred stock	(6,009)								(6,009)
Conversion of convertible preferred stock into common stock, shares				(1,401)	(1,508)		2,152,217	913,910
Conversion of convertible preferred stock into common stock	0			0	(1)		1,433	609			(1,433)	(608)
Cashless exercise of warrants and options, shares						122,848
Cashless exercise of warrants and options	0					82			(82)
Net Loss	(30,762,273)												(30,762,273)
BALANCE at Dec. 31, 2012	18,394,562		16	4	19	32,279			175,985,559				(157,623,315)
BALANCE, shares at Dec. 31, 2012			23,499	5,271	28,399	48,466,267
Common stock issued for:
Public offering, shares						9,146,920
Public offering	18,750,000					6,091			18,743,909
Public offering issuance costs	(459,515)								(459,515)
Vested restricted stock, shares	1,199,300					1,199,300
Vested restricted stock	0					799			(799)
Payment of dividends, shares						2,167,398
Payment of dividends	0					1,443			(1,443)
Payment of long-term debt obligation, shares						1,037,141
Payment of long-term debt obligation	1,915,000					691			1,914,309
Deemed dividend on beneficial conversion	304,724								304,724
feature related to convertible preferred stock	(304,724)								(304,724)
Issuance of convertible preferred stock, shares			863
Issuance of convertible preferred stock	2,047,575		0						2,047,575
Contingent dividend related to convertible preferred stock	0
Conversion of convertible preferred stock into common stock, shares				(3,661)	(4,206)		5,623,003	2,548,908
Conversion of convertible preferred stock into common stock	0			(3)	(3)		3,745	1,698			(3,742)	(1,695)
Stock-based compensation	943,146								943,146
Net Loss	(21,347,020)												(21,347,020)
BALANCE at Dec. 31, 2013	20,243,748		16	1	16	46,746			199,167,304				(178,970,335)
BALANCE, shares at Dec. 31, 2013			24,362	1,610	24,193	70,188,937
Common stock issued for:
Public offering, shares						7,475,000
Public offering	10,993,282					4,978			10,988,304
Public offering issuance costs	(32,019)								(32,019)
Vested restricted stock, shares	1,777,000					1,777,000
Vested restricted stock	0					1,184			(1,184)
Payment of dividends, shares						2,254,599
Payment of dividends	0					1,502			(1,502)
Purchase of properties, plant, and equipment, shares						728,578
Purchase of properties, plant and equipment	1,014,957					485			1,014,472
Payment of long-term debt obligation, shares						137,105
Payment of long-term debt obligation	274,210					91			274,119
Effective repurchase of common with issuance of long-term debt obligations, shares						(1,000,000)
Effective repurchase of common with issuance of long-term debt obligations	(783,784)					(666)			(783,118)
Conversion of convertible preferred stock into common stock, shares					(1,517)			919,381
Conversion of convertible preferred stock into common stock	0				(1)			612				(611)
Stock-based compensation	169,479								169,479
Net Loss	(9,638,773)
BALANCE at Dec. 31, 2014	$ 22,241,100		$ 16	$ 1	$ 15	$ 54,932			$ 210,795,244				$ (188,609,108)
BALANCE, shares at Dec. 31, 2014			24,362	1,610	22,676	82,480,600