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SCHEDULE II-VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Apr. 30, 2022 | Apr. 30, 2021 | Apr. 30, 2020
Allowance for doubtful accounts |  |  |
Movement in valuation and qualifying accounts and reserves |  |  |
Balance at Beginning of Period | $ 595 | $ 1,190 | $ 1,041
Balance Acquired from Acquisition | 5 |  |
Charged to Cost and Expenses | 52 | 82 | 219
Deductions | (60) | (677) | (70)
Balance at End of Period | 592 | 595 | 1,190
Warranty reserve |  |  |
Movement in valuation and qualifying accounts and reserves |  |  |
Balance at Beginning of Period | 2,341 | 2,015 | 1,704
Balance Acquired from Acquisition | 256 |  |
Charged to Cost and Expenses | 1,089 | 1,650 | 2,069
Deductions | (1,496) | (1,324) | (1,758)
Balance at End of Period | 2,190 | 2,341 | 2,015
Reserve for inventory excess and obsolescence |  |  |
Movement in valuation and qualifying accounts and reserves |  |  |
Balance at Beginning of Period | 10,289 | 10,232 | 7,824
Balance Acquired from Acquisition | 1,561 | 1,415 |
Charged to Cost and Expenses | 2,271 | 1,178 | 5,377
Deductions | (1,787) | (2,536) | (2,969)
Balance at End of Period | 12,334 | 10,289 | 10,232
Reserve for self-insured medical claims |  |  |
Movement in valuation and qualifying accounts and reserves |  |  |
Balance at Beginning of Period | 1,293 | 753 | 944
Charged to Cost and Expenses | 14,724 | 11,329 | 13,031
Deductions | (14,364) | (10,789) | (13,222)
Balance at End of Period | $ 1,653 | $ 1,293 | $ 753

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- Definition Amount of valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column B)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column E)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 + Details
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