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Warrants Outstanding to Purchase Common Stock (Detail)
 6 Months Ended
Jun. 30, 2012
Class of Warrant or Right [Line Items]  
Common shares issuable upon exercise of outstanding warrants 18,035,000
Investor warrants expiring April 30, 2015
  
Class of Warrant or Right [Line Items]  
Common shares issuable upon exercise of outstanding warrants 13,337,000 [1]
Exercise Price In CAD Dollars 1.44 [1]
Expiration Date Apr. 30, 2015 [1]
Investor warrants expiring March 29, 2016
  
Class of Warrant or Right [Line Items]  
Common shares issuable upon exercise of outstanding warrants 4,698,000 [2]
Exercise Price In CAD Dollars 1.44 [2]
Expiration Date Mar. 29, 2016 [2]
[1] On April 30, 2010, the Company announced that it had completed a first closing of a non-brokered private placement ("Private Placement") of 240,066 units, at a price of CAD $0.03 per unit for net proceeds of CAD$7,200. Each unit consisted of one common share and one common share purchase warrant (a "Warrant"). As a result of the Share Consolidation, each eighteen (18) Warrants now entitle the holder thereof to purchase one common share of the Company at a purchase price of CAD$1.44 per whole share for a period of five years from the issue date.
[2] On March 29, 2011, the Company announced that it had completed a non-brokered rights offering of 84,559 units, at a price of CAD $0.03 per unit for total net proceeds of $2,547. Each unit consisted of one common share and one common share purchase warrant (a "Warrant"). As a result of the Share Consolidation, each eighteen (18) Warrants now entitle the holder thereof to purchase one common share of the Company at a purchase price of CAD$1.44 per whole share for a period of five years from the issue date.