| Trading Securities | 
 As of June 30, 2018, and March 31, 2018, trading securities consisted
of: 
  
    |   | 
      | 
    June 30, 2018 | 
      | 
      | 
    March 31, 2018 (Recast) | 
      | 
 
    |   | 
      | 
      | 
      | 
      | 
      | 
      | 
 
    | Equity securities | 
      | 
    $ | 
    146,487 | 
      | 
      | 
    $ | 
    177,339 | 
      | 
 
    | Debt securities | 
      | 
      | 
    37,615 | 
      | 
      | 
      | 
    34,986 | 
      | 
 
    | Mutual investment funds | 
      | 
      | 
    248 | 
      | 
      | 
      | 
    270 | 
      | 
 
    | Total trading securities | 
      | 
    $ | 
    184,350 | 
      | 
      | 
    $ | 
    212,595 | 
      | 
 
 
  
The following tables present trading securities assets in the condensed
consolidated financial statements at fair value on a recurring basis as of June 30, 2018 and March 31, 2018: 
  
    |   | 
      | 
      | 
      | 
      | 
    Fair Value Measurements at | 
      | 
 
    |   | 
      | 
      | 
      | 
      | 
    June 30, 2018 using | 
      | 
 
    |   | 
      | 
      | 
      | 
      | 
    Quoted Prices in Active Markets for Identical Assets | 
      | 
      | 
    Significant Other Observable Inputs | 
      | 
      | 
    Significant unobservable units | 
      | 
 
    |   | 
      | 
    June 30, 2018 | 
      | 
      | 
    (Level 1) | 
      | 
      | 
    (Level 2) | 
      | 
      | 
    (Level 3) | 
      | 
 
    |   | 
      | 
      | 
      | 
      | 
      | 
      | 
      | 
      | 
      | 
      | 
      | 
      | 
 
    | Equity securities | 
      | 
    $ | 
    146,487 | 
      | 
      | 
    $ | 
    146,487 | 
      | 
      | 
    $ | 
    - | 
      | 
      | 
    $ | 
    - | 
      | 
 
    | Debt securities | 
      | 
      | 
    37,615 | 
      | 
      | 
      | 
    37,615 | 
      | 
      | 
      | 
    - | 
      | 
      | 
      | 
    - | 
      | 
 
    | Mutual investment funds | 
      | 
      | 
    248 | 
      | 
      | 
      | 
    248 | 
      | 
      | 
      | 
    - | 
      | 
      | 
      | 
    - | 
      | 
 
    | Total trading securities | 
      | 
    $ | 
    184,350 | 
      | 
      | 
    $ | 
    184,350 | 
      | 
      | 
    $ | 
    - | 
      | 
      | 
    $ | 
    - | 
      | 
 
 
  
    |   | 
      | 
      | 
      | 
      | 
    Fair Value Measurements at | 
      | 
 
    |   | 
      | 
      | 
      | 
      | 
    March 31, 2018 (Recast) using | 
      | 
 
    |   | 
      | 
      | 
      | 
      | 
    Quoted Prices in Active Markets for Identical Assets | 
      | 
      | 
    Significant Other Observable Inputs | 
      | 
      | 
    Significant unobservable units | 
      | 
 
    |   | 
      | 
    
         March 31, 2018 
         (Recast) 
 | 
      | 
      | 
    (Level 1) | 
      | 
      | 
    (Level 2) | 
      | 
      | 
    (Level 3) | 
      | 
 
    |   | 
      | 
      | 
      | 
      | 
      | 
      | 
      | 
      | 
      | 
      | 
      | 
      | 
 
    | Equity securities | 
      | 
    $ | 
    177,339 | 
      | 
      | 
    $ | 
    177,339 | 
      | 
      | 
    $ | 
    - | 
      | 
      | 
    $ | 
    - | 
      | 
 
    | Debt securities | 
      | 
      | 
    34,986 | 
      | 
      | 
      | 
    34,986 | 
      | 
      | 
      | 
    - | 
      | 
      | 
      | 
    - | 
      | 
 
    | Mutual investment funds | 
      | 
      | 
    270 | 
      | 
      | 
      | 
    270 | 
      | 
      | 
      | 
    - | 
      | 
      | 
      | 
    - | 
      | 
 
    | Total trading securities | 
      | 
    $ | 
    212,595 | 
      | 
      | 
    $ | 
    212,595 | 
      | 
      | 
    $ | 
    - | 
      | 
      | 
    $ | 
    - | 
      | 
 
 
  
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