INVENTORIES, NET (Details) - Schedule of Inventory, Current - USD ($) $ in Thousands	Oct. 31, 2021	Apr. 30, 2021
Schedule of Inventory, Current [Abstract]
Raw Materials and Component Parts	$ 12,288	$ 12,386
Work in Progress	6,689	6,259
Finished Goods	500	1,016
	$ 19,477	$ 19,661

No definition available.

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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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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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