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Shares and Preferred Shares Ordinary Shares (Details) | 3 Months Ended | 6 Months Ended |  |
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Sep. 30, 2021 $ / shares shares | Sep. 30, 2020 shares | Sep. 30, 2021 $ / shares shares | Sep. 30, 2020 shares | Sep. 30, 2021 EUR (€) shares | Jun. 02, 2021 $ / shares
Weighted Average Number of Shares Outstanding Reconciliation [Abstract] |  |  |  |  |  |
Weighted average shares outstanding - basic | 99,848,000 | 85,170,000 | 95,000,000 | 85,065,000 |  |
Dilutive effect of share equivalents | 841,000 | 674,000 | 840,000 | 695,000 |  |
Weighted average shares outstanding and share equivalents - diluted | 100,689,000 | 85,844,000 | 95,840,000 | 85,760,000 |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |  |
Preferred Stock, Shares Authorized |  |  |  |  | 50,000,000 |
Common Stock, Par or Stated Value Per Share | $ / shares | $ 0.001 |  | $ 0.001 |  |  | $ 0.001
Preferred Stock, Par or Stated Value Per Share | $ / shares | $ 0.001 |  | $ 0.001 |  |  |
Deferred Ordinary Shares |  |  |  |  | 25,000 |
Employee share option |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |  |
Number of share options that are antidilutive | 209,000 | 503,000 | 241,000 | 416,000 |  |
Euro Member Countries, Euro |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |  |
Par Value (Euros) of Deferred Ordinary Shares | € |  |  |  |  | € 1.00 |

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- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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