6. Trading and Available-For-Sale Securities at Fair Value (Details 2) - USD ($) $ in Thousands |
12 Months Ended | |||
|---|---|---|---|---|
Mar. 31, 2018 |
Mar. 31, 2017 |
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| Assets measured at amortized cost | $ 1 | |||
| Unrealized gain accumulated in other comprehensive income | 1 | |||
| Assets measured at fair value | 2 | |||
| (Recast) | ||||
| Assets measured at amortized cost | $ 1 | |||
| Unrealized gain accumulated in other comprehensive income | 1 | |||
| Assets measured at fair value | [1] | 2 | ||
| Equity securities | ||||
| Assets measured at amortized cost | 1 | 1 | ||
| Unrealized gain accumulated in other comprehensive income | 1 | 1 | ||
| Assets measured at fair value | $ 2 | $ 2 | ||
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| X | ||||||||||
- Definition Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of unrealized gain before deducting unrealized loss on investments in debt and equity securities classified as available-for-sale securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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