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Income Taxes (Details Narrative) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2022	Jan. 31, 2021	Apr. 30, 2022	Apr. 30, 2021
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Operating Income (Loss)	$ (5,552)	$ (3,163)	$ (15,768)	$ (9,569)	$ 5,000	$ 12,000
Proceeds from Debt, Net of Issuance Costs						1,000
US Employees [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Operating Income (Loss)						$ 20,000

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The net result for the period of deducting operating expenses from operating revenues.

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