9. Employee Benefit Plan	12 Months Ended
Apr. 30, 2021
Retirement Benefits [Abstract]
Employee Benefit Plan	Note 9 – Employee Benefit Plan We maintain a 401(k) Plan pursuant to section 401(k) of the Internal Revenue Code that allows participating employees to defer a portion of their compensation on a tax deferred basis up to the maximum amount permitted by the Internal Revenue Code. We match 50% of employee contributions of up to 6% of their annual eligible compensation. Total expense recognized by us for matching contributions to the 401(k) Plan for the fiscal years ended April 30, 2021, 2020 and 2019 was $0.5 million, $0.5 million and $0.4 million, respectively.

The entire disclosure for an entity's employee compensation and benefit plans, including, but not limited to, postemployment and postretirement benefit plans, defined benefit pension plans, defined contribution plans, non-qualified and supplemental benefit plans, deferred compensation, share-based compensation, life insurance, severance, health care, unemployment and other benefit plans.

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-Name Accounting Standards Codification
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-Publisher FASB
-Name Accounting Standards Codification
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-URI http://asc.fasb.org/topic&trid=2235017

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