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21. Net Gain on Trading Securities | 12 Months Ended
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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 |

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