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Property and Equipment - Schedule of Components of Property and Equipment (Details) - USD ($) $ in Thousands	Apr. 30, 2021	Apr. 30, 2020
Property and equipment, gross	$ 1,619	$ 1,656
Less: accumulated depreciation	(1,213)	(1,157)
Property and equipment, net	406	499
Equipment [Member]
Property and equipment, gross	291	342
Computer Equipment & Software [Member]
Property and equipment, gross	498	486
Office Furniture & Equipment [Member]
Property and equipment, gross	341	339
Leasehold Improvements [Member]
Property and equipment, gross	474	474
Construction in Process [Member]
Property and equipment, gross	$ 15	$ 15

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Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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