Annual report pursuant to Section 13 and 15(d)

Selected Quarterly Financial Data (Unaudited) (Details Textual)

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Selected Quarterly Financial Data (Unaudited) (Details Textual) (USD $)
In Millions, unless otherwise specified
1 Months Ended 3 Months Ended
Oct. 31, 2011
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Selected Quarterly Financial Data (Textual) [Abstract]          
Revised in the amortization expenses   $ 0.7 $ 0.3 $ 0.2 $ 0.2
Recorded gain $ 10.6