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Inventories (Details) - USD ($) $ in Thousands | Jan. 31, 2021 | Apr. 30, 2020
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Inventories [Abstract] |  |
Finished Goods | $ 29,996 | $ 36,014
Work-in-Process | 1,660 | 1,398
Paper and Other Materials | 269 | 331
Total Inventories Before Estimated Sales Returns and LIFO Reserve | 31,925 | 37,743
Inventory Value of Estimated Sales Returns | 11,800 | 8,686
LIFO Reserve | (3,040) | (2,815)
Total Inventories | $ 40,685 | $ 43,614

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- Definition Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.6(a)(1)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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