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Inventories | 9 Months Ended
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Jan. 31, 2020
Inventory, Net [Abstract] |
Inventories | Inventories The components of inventories were:
|  | January 31, |  | April 30,
(in thousands) |  | 2020 |  | 2019
Raw materials |  | $ | 55,875 |  |  | $ | 46,054 |
Work-in-process |  | 45,230 |  |  | 43,794 |
Finished goods |  | 37,018 |  |  | 34,873 |
Total FIFO inventories |  | 138,123 |  |  | 124,721 |
Reserve to adjust inventories to LIFO value |  | (16,193 | ) |  | (16,193 | )
Total inventories |  | $ | 121,930 |  |  | $ | 108,528 |
Of the total inventory of $121.9 million at January 31, 2020, $72.9 million is carried under the FIFO method of accounting and $49.0 million is carried under the LIFO method. Of the total inventory of $108.5 million at April 30, 2019, $58.6 million is carried under the FIFO method and $49.9 million is carried under the LIFO method.

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- Definition The entire disclosure for inventory. Includes, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the classes of inventory, and the nature of the cost elements included in inventory. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -URI http://asc.fasb.org/topic&trid=2126998 + Details
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- References No definition available. + Details
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