XML 12 R33.htm IDEA: XBRL DOCUMENT v2.4.0.6
Sales of Common Stock - Additional Information (Detail) (USD $)
In Millions, except Share data, unless otherwise specified
1 Months Ended 3 Months Ended 6 Months Ended 1 Months Ended 29 Months Ended 1 Months Ended
Jun. 30, 2012
Dec. 31, 2011
Dec. 31, 2011
At Market Issuance Sales Agreement
Mar. 31, 2012
At Market Issuance Sales Agreement
Jun. 30, 2012
At Market Issuance Sales Agreement
Mar. 31, 2010
At Market Issuance Sales Agreement
Jul. 31, 2012
At Market Issuance Sales Agreement
Subsequent Event
Jul. 31, 2012
At Market Issuance Sales Agreement
Subsequent Event
May 31, 2012
Other Additional Capital
Class of Stock [Line Items]                  
Stock Issued During Period, Shares, New Issues     700,000   5,100,000   1,500,000 23,094,140 10,000,000
Average sale price per share         $ 1.42       $ 1.22
Stock Issued During Period, Value, New Issues       $ 0.8 $ 7.1   $ 3.2   $ 12.1
Common stock issuable value           50      
Common stock, shares authorized 200,000,000 200,000,000       25,000,000      
Gross proceeds from sale of common stock               $ 46.1