Note 11 - Subsequent Events	6 Months Ended
Oct. 30, 2021
Notes to Financial Statements
Subsequent Events [Text Block]	*Note 11.* Subsequent Events** Effective on November 19, 2021, the Board approved a First Amendment to Rights Agreement, dated as of November 19, 2021 (the "First Amendment "). The First Amendment amends the Rights Agreements dated as of November 16, 2018 (the "Original Rights Agreement") between the Company and the Rights Agent. The First Amendment extends the expiration date of the rights (the "Rights") under the Original Rights Agreement from the close of business on November 19, 2021 to the close of business on November 19, 2024 and changes the initial exercise price to $20.00 per Right, subject to certain adjustments. The terms of the Rights are more fully described in Item 1.01 of the Company's Current Report 8-K filed with the Securities and Exchange Commission on November 19, 2021, including the First Amendment filed as Exhibit 4.2 to such Current Report on Form 8-K.

The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 855
-URI http://asc.fasb.org/topic&trid=2122774

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 855
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6842918&loc=SL6314017-165662

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