Note 12 - Stock-based Compensation - Summary of Stock Options (Details) - USD ($) |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Mar. 31, 2022 |
Mar. 31, 2021 |
Mar. 31, 2022 |
Mar. 31, 2021 |
|
| Outstanding balance (in shares) | 100,000 | |||
| Outstanding balance (in shares) | 100,000 | 100,000 | ||
| The 2010 Plan [Member] | ||||
| Outstanding balance (in shares) | 100,000 | |||
| Outstanding, weighted average exercise price (in dollars per share) | $ 14.50 | |||
| Granted (in shares) | 0 | |||
| Exercised (in shares) | 0 | 0 | 0 | 0 |
| Forfeited (in shares) | 0 | |||
| Outstanding balance (in shares) | 100,000 | 100,000 | ||
| Outstanding, weighted average exercise price (in dollars per share) | $ 14.50 | $ 14.50 | ||
| Aggregate intrinsic value, outstanding | $ 957,000 | $ 957,000 | ||
| Exercisable, end of the period (in shares) | 100,000 | 100,000 | ||
| Aggregate intrinsic value, exercisable | $ 957,000 | $ 957,000 | ||
| Available for grant, end of period (in shares) | 100,427 | 100,427 | ||
| Weighted average fair value per share of options granted during the period (in dollars per share) | $ 0 | |||
| X | ||||||||||
- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Gross number of share options (or share units) granted during the period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Number of options outstanding, including both vested and non-vested options. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Number of share options (or share units) exercised during the current period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Details
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