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Business Segment and Geographic Reporting (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017
Business Segment and Geographic Reporting (Textual) |  |  |  |
Total revenues | $ 8,964 |  | $ 24,522 | $ 80
One external customer [Member] |  |  |  |
Business Segment and Geographic Reporting (Textual) |  |  |  |
Total revenues | $ 4,000 |  | $ 9,100 |
One external customer [Member] | Revenue [Member] |  |  |  |
Business Segment and Geographic Reporting (Textual) |  |  |  |
Concentration risk, percentage |  |  | 10.00% |

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