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Inventories | 6 Months Ended
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Oct. 31, 2021
Inventory Disclosure [Abstract] |
Inventories | Inventories The Company measures inventory using the first-in, first-out ("FIFO") method at the lower of cost or net realizable value. Inventories consisted of the following (in thousands):
| October 31, 2021 |  | April 30, 2021
Finished products | $ | 4,541 |  |  | $ | 2,988 |
Work in process | 2,322 |  |  | 1,832 |
Raw materials | 11,257 |  |  | 11,697 |
Total | $ | 18,120 |  |  | $ | 16,517 |
The Company's International subsidiaries' inventories were $2,214,000 at October 31, 2021 and $2,560,000 at April 30, 2021 and are included in the above tables.

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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://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -URI http://asc.fasb.org/topic&trid=2126998 + Details
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