Quarterly report pursuant to Section 13 or 15(d)

Significant Accounting Policies (Details Textual)

v2.4.0.6
Significant Accounting Policies (Details Textual) (USD $)
In Thousands, unless otherwise specified
1 Months Ended 3 Months Ended 12 Months Ended
Dec. 31, 2012
Mar. 31, 2013
Feb. 29, 2012
Dec. 31, 2012
Accounting Policies [Abstract]        
Minimum period for releasing of escrow receivable   14 months    
Remaining amount of escrow receivable   $ 699    
Federal statutory income tax rate 35.00% 35.00% 35.00%  
Federal minimum alternative minimum tax rate   20.00%    
Federal capital gains income tax rate   20.00%   15.00%