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4. Cash and Cash Equivalents (Details 1) - USD ($) $ in Thousands | Mar. 31, 2018 | Mar. 31, 2017
--- | --- | ---
Remaining contractual maturity: up to 30 days | $ 10,547 |
Remaining contractual maturity: 30 - 90 days | 15,773 |
Total contractual maturity | $ 26,320 |
(Recast) |  |
Remaining contractual maturity: up to 30 days |  | $ 8,351
Remaining contractual maturity: 30 - 90 days |  | 25
Total contractual maturity |  | $ 8,376
Corporate equity |  |
Average interest rate | 14.68% | 19.56%
Remaining contractual maturity: up to 30 days | $ 10,026 | $ 8,346
Remaining contractual maturity: 30 - 90 days | 15,572 | 25
Total contractual maturity | $ 25,598 | $ 8,371
Corporate debt |  |
Average interest rate | 14.96% | 24.00%
Remaining contractual maturity: up to 30 days | $ 521 | $ 5
Remaining contractual maturity: 30 - 90 days | 201 | 0
Total contractual maturity | $ 722 | $ 5

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