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Basis of Presentation (Narrative) (Details) | 64 Months Ended |  |  |
--- | --- | --- | --- | ---
May 15, 2017 | Mar. 31, 2019 | Mar. 31, 2018 | May 16, 2017
PST Eletronica Ltda [Member] |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Percentage ownership in consolidated subsidiary | 74.00% |  |  |
Percentage of additional noncontrolling interest acquired |  |  |  | 26.00%
MSIL |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Ownership percentage |  | 49.00% | 49.00% |

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