Quarterly report pursuant to sections 13 or 15(d)

Description of Business and Basis of Presentation (Details)

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Description of Business and Basis of Presentation (Details) (USD $)
In Thousands, unless otherwise specified
6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Dec. 31, 2012
Receivables from clearing brokers $ 31,442   $ 16,973
Net cash provided by operating activities 744 1,036  
Restatement adjustment
     
Receivables from clearing brokers 8,142    
Net cash provided by operating activities $ 827