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21. Net Gain on Trading Securities
12 Months Ended
Mar. 31, 2018
Gain (Loss) on Investments [Abstract]  
Net Gain on Trading Securities
   

Year ended

March 31,

2018

   

Year ended

March 31,

2017

(Recast)

 
             
Net gain recognized during the period on trading securities sold during the period   $ 17,314     $ 5,322  
Net unrealized gain recognized during the reporting period on trading securities still held at the reporting date     16,432       5,484  
Net gain recognized during the period on trading securities   $ 33,746     $ 10,806