XML 41 R43.htm IDEA: XBRL DOCUMENT v2.4.0.6
Warrants to Purchase Common Shares Outstanding (Detail)
Dec. 31, 2011
Class of Warrant or Right [Line Items]  
Amount 21,106,363
Exercise Price 1.48
Warrant issued on 4/27/07
  
Class of Warrant or Right [Line Items]  
Amount 17,500
Exercise Price 17.90
Expiration Date 1/17/14
Warrant issued on 6/1/07
  
Class of Warrant or Right [Line Items]  
Amount 55,737
Exercise Price 7.20
Expiration Date 5/31/12
Warrant issued on 12/5/07
  
Class of Warrant or Right [Line Items]  
Amount 516,300
Exercise Price 1.17
Expiration Date 12/3/12
Warrant issued on 7/31/09
  
Class of Warrant or Right [Line Items]  
Amount 138,888
Exercise Price 1.00
Expiration Date 7/30/14
Warrant issued on 7/31/09
  
Class of Warrant or Right [Line Items]  
Amount 1,666,000
Exercise Price 1.00
Expiration Date 7/30/14
Warrant issued on 10/16/09
  
Class of Warrant or Right [Line Items]  
Amount 18,064,888
Exercise Price 1.50
Expiration Date 10/15/14
Warrant issued on 10/16/09
  
Class of Warrant or Right [Line Items]  
Amount 647,050
Exercise Price 1.50
Expiration Date 10/15/14