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Segment Information - (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Apr. 30, 2024 | Apr. 30, 2023
Segment Reporting Information [Line Items] |  |
Net sales | $ 203,755 | $ 219,494
Intersegment revenues | 0 | 0
Depreciation | 3,125 | 2,867
Earnings (loss) before income taxes | 13,119 | 4,498
Income tax expense | (5,938) | 3,139
Net earnings attributable to non-controlling interest | 304 | 621
Net earnings (loss) attributable to Kewaunee Scientific Corporation | 18,753 | 738
Segment assets | 134,766 | 118,898
Expenditures for segment assets | 4,373 | 4,148
Non-US |  |
Segment Reporting Information [Line Items] |  |
Net sales | 67,692 | 75,337
Corporate |  |
Segment Reporting Information [Line Items] |  |
Earnings (loss) before income taxes | (8,224) | (6,292)
Income tax expense | (12,113) | 889
Net earnings (loss) attributable to Kewaunee Scientific Corporation | 3,890 | (7,181)
Intersegment revenues |  |
Segment Reporting Information [Line Items] |  |
Intersegment revenues | (4,698) | (11,426)
Depreciation | 193 | 191
Domestic | Operating Segments |  |
Segment Reporting Information [Line Items] |  |
Net sales | 137,238 | 146,716
Depreciation | 2,524 | 2,394
Earnings (loss) before income taxes | 15,048 | 3,408
Income tax expense | 3,240 | 0
Net earnings (loss) attributable to Kewaunee Scientific Corporation | 11,808 | 3,408
Segment assets | 91,656 | 80,000
Expenditures for segment assets | 3,759 | 2,856
Domestic | Operating Segments | Non-US |  |
Segment Reporting Information [Line Items] |  |
Net sales | 1,175 | 2,559
Domestic | Intersegment revenues |  |
Segment Reporting Information [Line Items] |  |
Intersegment revenues | 636 | 1,604
International | Operating Segments |  |
Segment Reporting Information [Line Items] |  |
Net sales | 66,517 | 72,778
Depreciation | 408 | 282
Earnings (loss) before income taxes | 6,295 | 7,382
Income tax expense | 2,935 | 2,250
Net earnings attributable to non-controlling interest | 304 | 621
Net earnings (loss) attributable to Kewaunee Scientific Corporation | 3,055 | 4,511
Segment assets | 43,110 | 38,898
Expenditures for segment assets | 614 | 1,292
International | Operating Segments | Non-US |  |
Segment Reporting Information [Line Items] |  |
Net sales | 66,517 | 72,778
International | Intersegment revenues |  |
Segment Reporting Information [Line Items] |  |
Intersegment revenues | $ 4,062 | $ 9,822

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