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Note 17 - Share-based Compensation - Equity-based Compensation Expenses Related to Performance-based Shares (Details) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2018
Total expense | $ 1,000 | $ 300 | $ 100 | $ 1,000
Restricted Stock Units (RSUs) [Member] |  |  |  |
Total expense |  | 160 | (131) | 537
Restricted Stock Units (RSUs) [Member] | Granted Within the Fiscal Year Ended June 30, 2016 [Member] |  |  |  |
Total expense |  |  | 5 | 92
Restricted Stock Units (RSUs) [Member] | Granted Within the Fiscal Year Ended June 30, 2017 [Member] |  |  |  |
Total expense |  |  |  | (12)
Restricted Stock Units (RSUs) [Member] | Granted Within the Fiscal Year Ended June 30, 2018 [Member] |  |  |  |
Total expense |  |  | (457) | 457
Restricted Stock Units (RSUs) [Member] | Granted Within the Fiscal Year Ended June 30, 2019 [Member] |  |  |  |
Total expense |  | 101 | 321 |
Restricted Stock Units (RSUs) [Member] | Granted Within the Fiscal Year Ended June 30, 2020 [Member] |  |  |  |
Total expense |  | $ 59 |  |

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