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Significant Accounting Policies (Tables) | 12 Months Ended
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Apr. 30, 2021
Accounting Policies [Abstract] |
Summary of Estimated Useful Lives | A summary of the estimated useful lives is as follows:
Description |  | Useful Life |
Building and improvements |  |  | 10 to 40 years |
Software and hardware |  |  | 2 to 7 years |
Machinery and equipment |  |  | 2 to 10 years |
Reconciliation of Net Income/(Loss) Amounts and Weighted Average Number of Common and Common Equivalent Shares Used to Determine Basic and Diluted (Loss)/Earnings per Common Share | The following table provides a reconciliation of the net income/(loss) amounts and weighted average number of common and common equivalent shares used to determine basic and diluted earnings/(loss) per common share (in thousands, except per share data):
| For the Year Ended April 30, |
| 2021 |  |  | 2020 |  |  | 2019 |
Net income/(loss) |  |  |  |  |  |  |  |  |  |  |
Income from continuing operations | $ | 243,571 |  |  | $ | 27,653 |  |  | $ | 24,920 |
Income/(loss) from discontinued operations |  | 8,478 |  |  |  | (88,883 | ) |  |  | (6,510 | )
Net income/(loss) | $ | 252,049 |  |  | $ | (61,230 | ) |  | $ | 18,410 |
Weighted average shares outstanding — Basic |  | 54,613 |  |  |  | 54,983 |  |  |  | 54,483 |
Effect of dilutive stock awards |  | 739 |  |  | 682 |  |  |  | 733 |
Weighted average shares outstanding — Diluted |  | 55,352 |  |  |  | 55,665 |  |  |  | 55,216 |
Earnings/(loss) per share — Basic |  |  |  |  |  |  |  |  |  |  |
Income from continuing operations | $ | 4.46 |  |  | $ | 0.50 |  |  | $ | 0.46 |
Income/(loss) from discontinued operations | $ | 0.16 |  |  | $ | (1.62 | ) |  | $ | (0.12 | )
Net income/(loss) | $ | 4.62 |  |  | $ | (1.11 | ) |  | $ | 0.34 |
Earnings/(loss) per share — Diluted |  |  |  |  |  |  |  |  |  |  |
Income from continuing operations | $ | 4.40 |  |  | $ | 0.50 |  |  | $ | 0.45 |
Income/(loss) from discontinued operations | $ | 0.15 |  |  | $ | (1.60 | ) |  | $ | (0.12 | )
Net income/(loss) | $ | 4.55 |  |  | $ | (1.10 | ) |  | $ | 0.33 |
Change in Accrued Warranties Recorded as Non-Current Liability | The following table sets forth the change in accrued warranties, a portion of which is recorded as a non-current liability, in the fiscal years ended April 30, 2021, 2020, and 2019 (in thousands):
Balance as of April 30, 2019 |  |  | 5,026 |
Warranties issued and adjustments to provisions |  |  | 1,757 |
Warranty claims |  |  | (2,887 | )
Balance as of April 30, 2020 |  |  | 3,896 |
Warranties issued and adjustments to provisions |  |  | 5,163 |
Warranty claims |  |  | (3,366 | )
Balance as of April 30, 2021 | $ |  | 5,693 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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- Definition Tabular disclosure of the changes in the guarantor's aggregate product warranty liability, including the beginning balance of the aggregate product warranty liability, the aggregate reductions in that liability for payments made (in cash or in kind) under the warranty, the aggregate changes in the liability for accruals related to product warranties issued during the reporting period, the aggregate changes in the liability for accruals related to preexisting warranties (including adjustments related to changes in estimates), and the ending balance of the aggregate product warranty liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=68068213&loc=d3e12565-110249 + Details
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