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Significant Accounting Policies (Details Textual) (USD $)
3 Months Ended
Mar. 31, 2013
Segment
Dec. 31, 2012
Significant Accounting Policies (Textual) [Abstract]    
Allowance for doubtful accounts $ 0 $ 0
Number of business segment 1  
Number of dilutive securities outstanding 0  
Advance Commissions Amortization Period 12 months  
Money Market Funds [Member] | Mutual Funds [Member] | Level 1 Inputs [Member]
   
Significant Accounting Policies (Additional Textual) [Abstract]    
Cash equivalent fair value $ 2,000,000 $ 4,100,000