Note 15 - Equity Incentive Plans - Stock Options Outstanding (Details)	12 Months Ended
Jun. 30, 2024 $ / shares shares
Range of exercise prices (in dollars per share)	$ 6.18
Number of options outstanding (in shares) \| shares	146,539
Weighted average remaining contractual life of options outstanding (Year)	8 years 9 months 18 days
Number of options exercisable (in shares) \| shares	25,068
Weighted average exercise price (in dollars per share)	$ 225.74
Exercise Price Range One [Member]
Range of exercise prices (in dollars per share)	$ 1.73
Number of options outstanding (in shares) \| shares	102,000
Weighted average remaining contractual life of options outstanding (Year)	9 years 1 month 6 days
Exercise Price Range Two [Member]
Range of exercise prices (in dollars per share)	$ 2.53
Number of options outstanding (in shares) \| shares	1,500
Weighted average remaining contractual life of options outstanding (Year)	9 years 7 months 6 days
Exercise Price Range Three [Member]
Range of exercise prices (in dollars per share)	$ 16.85
Number of options outstanding (in shares) \| shares	43,039
Weighted average remaining contractual life of options outstanding (Year)	8 years 1 month 6 days
Number of options exercisable (in shares) \| shares	25,068
Weighted average exercise price (in dollars per share)	$ 225.74
Exercise Price Range Three [Member] \| Minimum [Member]
Range of exercise prices (in dollars per share)	4
Exercise Price Range Three [Member] \| Maximum [Member]
Range of exercise prices (in dollars per share)	$ 290

The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(iii)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

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- Definition

The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(ii)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

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Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iii)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

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The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices.

+ References

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- Definition

Weighted average remaining contractual term of outstanding stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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