Balances of Debentures (Detail) (USD $)	Jun. 30, 2013	Dec. 31, 2012
Debt Instrument [Line Items]
Balance at beginning of period	$ 1,129,473	$ 0
Issuance of debentures for cash	862,000	3,186,000
Original issue discount	45,369	167,685
Debentures surrended in exchange transaction	(300,002)	0
Debentures issued in exchange transaction	325,261	0
Debentures converted to common stock	(263,158)	(2,224,212)
Convertible debt	1,798,943	1,129,473
Less unamortized costs of financing	321,915	520,851
Convertible debt, net of unamortized costs	1,477,028	608,622
Convertible debt in default	$ 566,319	$ 0