Debt (Detail) - USD ($)	9 Months Ended
	Sep. 30, 2015	Jun. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
Debt Instrument [Line Items]
Convertible debt	$ 36,936,986		$ 32,258,031
Less debt discount	(2,390,265)		(4,360,647)
Subtotal - net of debt discount	34,546,721		27,897,384
Less current portion	(9,880,276)		(5,011,738)
Total - long term debt	$ 24,666,445		22,885,646
8% convertible promissory notes due on august 2017
Debt Instrument [Line Items]
Convertible debt, due date	Aug. 31, 2017
Convertible debt	$ 16,628,188		16,628,188
12% convertible revolving credit agreement
Debt Instrument [Line Items]
Convertible debt, due date	Dec. 31, 2015
Convertible debt	$ 2,300,000		2,000,000
3% promissory note
Debt Instrument [Line Items]
Convertible debt, due date	Feb. 01, 2018
Convertible debt	$ 214,134	$ 214,134	279,843
4.25% Bank term loans
Debt Instrument [Line Items]
Convertible debt, due date	Nov. 15, 2018
Convertible debt	$ 4,400,000		4,400,000
8% convertible promissory notes (2014)
Debt Instrument [Line Items]
Convertible debt, due date	Jun. 11, 2019
Convertible debt	$ 2,000,000		2,000,000
12% Convertible Promissory Notes
Debt Instrument [Line Items]
Convertible debt	$ 1,000,000		1,000,000
Less debt discount				$ (84,038)
5% Bank Promissory Note
Debt Instrument [Line Items]
Convertible debt, due date	Sep. 18, 2017
Convertible debt	$ 4,000,000		4,000,000
12% secured notes
Debt Instrument [Line Items]
Convertible debt	$ 6,394,664		$ 1,950,000