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Treasury Shares	9 Months Ended
	Jan. 31, 2021
Equity [Abstract]
Treasury Shares	(13) Treasury Shares During each of the three months ended January 31, 2021 and 2020, 16,789 shares and zero shares of common stock were purchased by the Company from employees to pay taxes related to the vesting of restricted stock. During each of the nine months ended January 31, 2021 and 2020, 16,789 shares and 481 shares of common stock were purchased by the Company from employees to pay taxes related to the vesting of restricted stock.

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- References

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- Definition

The entire disclosure for treasury stock, including, but not limited to, average cost per share, description of share repurchase program, shares repurchased, shares held for each class of treasury stock.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 30
-URI http://asc.fasb.org/subtopic&trid=2208821

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