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Note 13 - Stockholders' Equity - Treasury Stock Activity (Details) - USD ($) | 1 Months Ended | 12 Months Ended
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Nov. 30, 2022 | Oct. 31, 2022 | May 31, 2022 | Mar. 31, 2022 | Feb. 28, 2022 | Nov. 30, 2022
Number of shares (in shares) | 61,037 | 324,992 | 729,709 | 754,081 | 296,168 | 2,165,987
Cost of shares | $ 434,920 | $ 2,065,076 | $ 4,999,993 | $ 7,346,422 | $ 2,653,571 | $ 17,499,982
Average cost per share (in dollars per share) | $ 7.1 | $ 6.4 | $ 6.9 | $ 9.7 | $ 9.0 | $ 8.1

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- Definition Total cost of shares repurchased divided by the total number of shares repurchased. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 + Details
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