v2.4.0.6
Summary Of Warrants Outstanding (Detail)
3 Months Ended
Mar. 31, 2013
Feb. 19, 2013
Mar. 31, 2012
Mar. 31, 2013
Ipo
Mar. 31, 2013
Sep 20, 2012 Private Placement
Mar. 31, 2013
2009 private placement
Mar. 31, 2013
November 13, 2012 private placement
Mar. 31, 2013
Ipo underwriters
Mar. 31, 2013
February 2013 private placement
Mar. 31, 2013
Co placement agents
Mar. 31, 2013
Placement Agent
Sep 20, 2012 Private Placement
Mar. 31, 2013
Placement Agent
November 13, 2012 private placement
Warrants and Rights Note Disclosure [Line Items]                        
Class of warrant or right, outstanding 8,610,665   4,807,534 4,043,569 2,125,000 503,034 1,185,000   400,000 18,250 212,500 118,500
Class of warrant or right, number of securities called by warrants or rights               4,812        
Class of warrant or right, exercise price of warrants or rights   1.50   3.4375 0.4 3.4375 0.40   1.50 7.84 0.40 0.40
Class of warrant or right number of securities called by warrants or rights weighted average exercise price               3.9        
Class of warrant or right expiration date       Mar. 24, 2015 Sep. 20, 2017 Oct. 29, 2014 Nov. 13, 2017   Feb. 19, 2018 Oct. 29, 2014 Sep. 20, 2017 Nov. 13, 2017
Class of warrant or right number of securities called by warrants or rights expiry date               Mar. 24, 2015