Annual report pursuant to section 13 and 15(d)

Property and Equipment (Details Textual)

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Property and Equipment (Details Textual) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Property and Equipment (Textual) [Abstract]    
Depreciation expense recorded in general and administrative expenses $ 5,668 $ 6,386