Reconciliation of Derivative Liability Used in Determining Fair Value (Detail) (USD $)	3 Months Ended		6 Months Ended			12 Months Ended	6 Months Ended	12 Months Ended	6 Months Ended	12 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2012	Mar. 31, 2012	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012 Conversion Options	Dec. 31, 2011 Conversion Options	Jun. 30, 2012 Warrant	Dec. 31, 2011 Warrant	Jun. 30, 2012 Bonus Warrants	Dec. 31, 2011 Bonus Warrants	Jun. 30, 2012 Placement Agent Warrant	Dec. 31, 2011 Placement Agent Warrant
Derivative [Line Items]
Beginning Balance					$ 113,271		$ 1,875,463		$ 70,343		$ 487,555
Fair value of derivative liability			347,097	(487,555)		118,663				797,185		487,555
Change in fair value	127,071		113,271		(113,271)	(5,392)		1,875,463	(13,309)	(492,111)	(347,097)
Credited to common stock upon issuance of warrants		1,900,000					(1,875,463)		(57,034)	(234,731)
Ending Balance						$ 113,271		$ 1,875,463		$ 70,343	$ 140,458	$ 487,555