CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($)	Total	7.5% Series A-1 Convertible Preferred Stock	7.5% Series A-2 Convertible Preferred Stock	7.5% Series B 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-1 Convertible Preferred 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, 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
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 feature related to convertible preferred stock	304,724											304,724
Deemed dividend on beneficial conversion 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
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	$ 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
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)															(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
Common stock issued for:
Public offering, shares								10,169,492
Public offering	6,000,000							$ 6,773				5,993,227
Public offering issuance costs	(96,393)											(96,393)
Vested restricted stock, shares								60,000
Vested restricted stock	$ 0							$ 40				(40)
Payment of dividends, shares	6,172,020							11,842,085
Payment of dividends	$ 0							$ 7,887				(7,887)
Purchase of properties, plant, and equipment, shares								1,726,312
Purchase of properties, plant and equipment	1,024,790							$ 1,150				1,023,640
Conversion of convertible preferred stock into common stock, shares					(24,362)	(1,610)	(22,676)		37,422,416	2,473,597	13,743,209
Conversion of convertible preferred stock into common stock		$ 0	$ 0	$ 0	$ (16)	$ (1)	$ (15)		$ 24,923	$ 1,647	$ 9,153		$ (24,907)	$ (1,646)	$ (9,138)
Stock-based compensation	44,400											44,400
Net Loss	(10,454,427)															(10,454,427)
BALANCE at Dec. 31, 2015	$ 18,759,470				$ 0	$ 0	$ 0	$ 106,505				$ 217,716,500				$ (199,063,535)
BALANCE, shares at Dec. 31, 2015					0	0	0	159,917,711