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Inventories (Details) - USD ($) $ in Thousands	Jan. 31, 2020	Apr. 30, 2019
Inventories [Abstract]
Finished Goods	$ 35,766	$ 33,736
Work-in-Process	1,291	2,094
Paper and Other Materials	324	373
Total Inventories Before Estimated Sales Returns and LIFO Reserve	37,381	36,203
Inventory Value of Estimated Sales Returns	9,929	3,739
LIFO Reserve	(4,171)	(4,360)
Total Inventories	$ 43,139	$ 35,582

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Amount of inventory reserves for estimated sales returns.

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Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

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Gross amount, as of the balance sheet date, of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process.

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Amount by which inventory stated at last-in first-out (LIFO) is less than (in excess of) inventory stated at other inventory cost methods.

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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Amount before valuation and LIFO reserves of raw materials expected to be sold, or consumed within one year or operating cycle, if longer.

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Amount before valuation and LIFO reserves of merchandise or goods in the production process expected to be completed within one year or operating cycle, if longer.

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