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Investments in Affiliates (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 28, 2023	Jan. 29, 2022	Jan. 28, 2023	Jan. 29, 2022	Apr. 30, 2022
Schedule of Investments [Line Items]
Equity method investments	$ 17,145		$ 17,145		$ 16,916
Equity in loss of affiliate	895	$ 401	2,596	$ 1,966
Accounts payable	52		52
Amount invested			3,240	$ 6,695
Debt conversion, converted instrument, amount			2,823
Purchase of convertible notes	$ 7,693		$ 7,693
Miortech
Schedule of Investments [Line Items]
Ownership percentage	54.50%		54.50%
XdisplayTM
Schedule of Investments [Line Items]
Ownership percentage	16.40%		16.40%
Convertible Debt
Schedule of Investments [Line Items]
Amount invested			$ 2,250
Promissory Notes
Schedule of Investments [Line Items]
Amount invested			$ 990
Product Design and Development
Schedule of Investments [Line Items]
Related party transaction, amounts of transaction	$ 672	$ 1,520

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