Debt (Detail) - Entity [Domain] - USD ($)	6 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Convertible debt, due date	Aug. 31, 2017
Convertible debt	$ 36,959,053	$ 32,258,031
Less debt discount	(2,971,525)	(4,360,647)
Subtotal - net of debt discount	33,987,528	27,897,384
Less current portion	(9,862,533)	(5,011,738)
Total - long term debt	24,124,995	22,885,646
8% convertible promissory notes due on august 2017
Debt Instrument [Line Items]
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	$ 236,201	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, due date	Jun. 30, 2015
Convertible debt	$ 1,000,000	1,000,000
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, due date	Jun. 30, 2015
Convertible debt	$ 6,394,664	$ 1,950,000