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Note 11 - Common Stock and Class B Common Stock (Details Textual) - $ / shares | Sep. 26, 2021 | Mar. 30, 2018 | Mar. 30, 2017
--- | --- | --- | ---
Class of Warrant or Right, Outstanding (in shares) | 600,000 |  |
Warrant Agreement [Member] |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) |  |  | 600,000
Class of Warrant or Right, Percentage of Common Stock Outstanding |  |  | 10.10%
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) |  |  | $ 41.90
Class of Warrant or Right, Outstanding (in shares) | 71,000 | 16,930,000 |

X
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- Definition Exercise price per share or per unit of warrants or rights outstanding. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=123467817&loc=d3e21475-112644 + Details
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X
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