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Note 15 - Stockholders' Equity (Details Textual) - USD ($) |  |  |  |  |  |  | 1 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jun. 27, 2022 | Jun. 21, 2022 | Jun. 01, 2022 | May 25, 2022 | Mar. 25, 2022 | Feb. 25, 2022 | Aug. 31, 2022 | May 31, 2022 | Apr. 30, 2022 | Feb. 28, 2022 | Jan. 31, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021 | Dec. 31, 2021 | Nov. 30, 2023 | Nov. 03, 2022
Stock Issued During Period, Shares, Acquisitions (in shares) | 3,522,117 | 371,517 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, Warrants and Stock Options Exercised (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 977,588 |  |  |  |
Stock Issued During Period, Shares, Warrant Exercises (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 965,588 |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 12,000 |  | 154,268 |  |
Dividends declared, per share (in dollars per share) |  |  |  |  |  |  |  |  |  |  |  | $ 0.025 | $ 0.025 | $ 0 | $ 0.05 | $ 0 |  |  |
Dividends, Total |  |  |  | $ 2,600,000 |  | $ 2,400,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Common Stock, Shares, Outstanding, Ending Balance (in shares) |  |  |  |  |  |  |  |  |  |  |  | 109,226,591 |  |  | 109,226,591 |  | 96,774,185 |  |
Class of Warrant or Right, Outstanding (in shares) |  |  |  |  |  |  |  |  |  |  |  | 8,290,572 |  |  | 8,290,572 |  | 9,500,166 |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) |  |  |  |  |  |  |  |  |  |  |  | $ 11.50 |  |  | $ 11.50 |  |  |  |
Common Stock, Capital Shares Reserved for Future Issuance (in shares) |  |  |  |  |  |  |  |  |  |  |  | 21,694,763 |  |  | 21,694,763 |  |  |  |
Contingent Value Right [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Outstanding (in shares) |  |  |  |  |  |  |  |  |  |  |  | 10,209,300 |  |  | 10,209,300 |  | 10,209,300 |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) |  |  |  |  |  |  |  |  |  |  |  | $ 2.125 |  |  | $ 2.125 |  |  |  |
Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends Payable |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 53,000 | $ 53,000
Quarterly Dividend [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends declared, per share (in dollars per share) |  |  |  |  |  |  |  |  | $ 0.025 |  | $ 0.025 |  |  |  |  |  |  |  |
Dividend Equivalent [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends, Total |  |  |  |  |  |  |  | $ 214,000 |  | $ 214,000 |  |  |  |  |  |  |  |  |
Dividends Payable |  |  |  |  |  |  |  | $ 36,000 |  | $ 36,000 |  |  |  |  |  |  |  |  |
Dividend Equivalent [Member] | Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends, Total |  |  |  |  |  |  | $ 263,000 |  |  |  |  |  |  |  |  |  |  |  |
Share-Based Payment Arrangement, Nonemployee [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, Restricted Stock Award, Gross (in shares) |  |  | 21,184 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-Based Payment Arrangement, Employee [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, Restricted Stock Award, Gross (in shares) |  |  | 600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Flat Top Operating Area [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, Acquisitions (in shares) |  |  |  |  | 6,960,000 |  |  |  |  |  |  |  |  |  | 10,853,634 |  |  |  |

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