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Warrants Outstanding to Purchase Common Stock (Parenthetical) (Detail)
In Thousands, except Share data, unless otherwise specified
 12 Months Ended 1 Months Ended 1 Months Ended
Jun. 30, 2000
USD ($)
Jun. 30, 1999
USD ($)
Jun. 30, 1997
USD ($)
Jun. 30, 2012
Apr. 30, 2010
Private Placement
CAD
Jun. 30, 2012
Private Placement
Mar. 29, 2011
Non-broker Rights Offering
CAD
Jun. 30, 2012
Non-broker Rights Offering
Class of Warrant or Right [Line Items]                
Issuance of stock $ 793 $ 1,615 $ 0   240,066   84,559  
Issuance of stock, price per share         0.03   0.03  
Proceeds from issuance of unit         7,200   2,547  
Common shares issuable upon exercise of outstanding warrants       18,035,000   18   18
Warrants, exercise Price           1.44   1.44
Warrants, term         5 years   5 years