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Note 15 - Stockholders' Equity - Treasury Stock Activity (Details) - USD ($) | 1 Months Ended | 3 Months Ended | 4 Months Ended | 6 Months Ended
--- | --- | --- | --- | ---
May 31, 2022 | Mar. 31, 2022 | Feb. 28, 2022 | May 31, 2022 | May 31, 2022 | May 31, 2022
Number of shares (in shares) | 729,709 | 754,081 | 296,168 |  | 1,779,958 |
Cost of shares | $ 4,999,993 | $ 7,346,422 | $ 2,653,571 | $ 12,346,000 | $ 14,999,986 | $ 15,000,000
Average cost per share (in dollars per share) | $ 6.9 | $ 9.7 | $ 9.0 |  | $ 8.4 |

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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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