4. Cash and Cash Equivalents (Details 1) - USD ($) $ in Thousands |
Jun. 30, 2017 |
Mar. 31, 2017 |
|---|---|---|
| Remaining contractual maturity: up to 30 days | $ 16,017 | $ 8,351 |
| Remaining contractual maturity: 30 - 90 days | 5,315 | 25 |
| Remaining contractual maturity | $ 21,332 | $ 8,376 |
| Corporate equity | ||
| Average interest rate | 17.89% | 19.56% |
| Remaining contractual maturity: up to 30 days | $ 12,431 | $ 8,346 |
| Remaining contractual maturity: 30 - 90 days | 5,311 | 25 |
| Remaining contractual maturity | $ 17,742 | $ 8,371 |
| Non-US sovereign debt | ||
| Average interest rate | 9.10% | |
| Remaining contractual maturity: up to 30 days | $ 3,554 | |
| Remaining contractual maturity: 30 - 90 days | 0 | |
| Remaining contractual maturity | $ 3,554 | |
| Corporate debt | ||
| Average interest rate | 17.96% | 24.00% |
| Remaining contractual maturity: up to 30 days | $ 32 | $ 5 |
| Remaining contractual maturity: 30 - 90 days | 4 | 0 |
| Remaining contractual maturity | $ 36 | $ 5 |