XML 26 R17.htm IDEA: XBRL DOCUMENT v3.8.0.1
5. Fair Value Measurements (Tables)
3 Months Ended
Mar. 31, 2018
Fair Value Measurements Tables  
Assets and liabilities measured at fair value on a recurring basis
    Level 1     Level 2     Level 3     Total  
Assets                                
Securities owned                                
Municipal obligations           115,543             115,543  
Corporate obligations           230,659             230,659  
Total         $ 346,202           $ 346,202