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v3.19.1

Segment Information - Segment Revenues and Operating Profits (Losses) (Parenthetical) (Detail) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Mar. 31, 2019 | Mar. 31, 2018 | Mar. 31, 2017 | Mar. 31, 2016
Segment Reporting Information [Line Items] |  |  |  |
Income (loss) from operations | $ (60,620) | $ (92,187) | $ 36,459 |
TrellisWare [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Minority interest ownership percentage by parent |  |  | 52.00% | 52.00%
Operating Segments [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Income (loss) from operations | (50,965) | (79,956) | $ 47,247 |
Operating Segments [Member] | Satellite Services [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Income (loss) from operations | (64,321) | 12,018 | 131,085 |
Operating Segments [Member] | Government Systems [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Income (loss) from operations | $ 179,969 | $ 137,131 | 96,658 |
Uncharacterized damages and penalties |  |  | 11,800 |
Operating Segments [Member] | Implied License [Member] | Satellite Services [Member] | Product [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Product revenues |  |  | 26,800 |
Income (loss) from operations |  |  | $ 26,800 |

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