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Note 11 - Stock-based Compensation - Stock Options Outstanding (Details) | 6 Months Ended
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Dec. 31, 2022 $ / shares shares
Outstanding, exercise prices range lower limit (in dollars per share) | $ 13.20
Outstanding, exercise prices range upper (in dollars per share) | $ 175.50
Number outstanding (in shares) | shares | 37,032
Weighted average remaining contractual lifeWeighted average remaining contractual life (Year) | 9 years
Outstanding, Weighted Average Exercise Price (in dollars per share) | $ 27.91
Shares Exercisable (in shares) | shares | 2,671
Exercisable, Weighted Average Exercise Price (in dollars per share) | $ 151.62
Exercise Price Range 1 [Member] |
Outstanding, exercise prices range lower limit (in dollars per share) | 13.20
Outstanding, exercise prices range upper (in dollars per share) | $ 19.20
Number outstanding (in shares) | shares | 34,361
Weighted average remaining contractual lifeWeighted average remaining contractual life (Year) | 9 years 4 months 6 days
Outstanding, Weighted Average Exercise Price (in dollars per share) | $ 18.30
Shares Exercisable (in shares) | shares | 0
Exercisable, Weighted Average Exercise Price (in dollars per share) | $ 0
Exercise Price Range 2 [Member] |
Outstanding, exercise prices range lower limit (in dollars per share) | 55.50
Outstanding, exercise prices range upper (in dollars per share) | $ 84.90
Number outstanding (in shares) | shares | 431
Weighted average remaining contractual lifeWeighted average remaining contractual life (Year) | 5 years 9 months 3 days
Outstanding, Weighted Average Exercise Price (in dollars per share) | $ 62.22
Shares Exercisable (in shares) | shares | 431
Exercisable, Weighted Average Exercise Price (in dollars per share) | $ 62.22
Exercise Price Range 3 [Member] |
Outstanding, exercise prices range lower limit (in dollars per share) | 159.00
Outstanding, exercise prices range upper (in dollars per share) | $ 175.50
Number outstanding (in shares) | shares | 2,240
Weighted average remaining contractual lifeWeighted average remaining contractual life (Year) | 4 years 4 months 9 days
Outstanding, Weighted Average Exercise Price (in dollars per share) | $ 168.82
Shares Exercisable (in shares) | shares | 2,240
Exercisable, Weighted Average Exercise Price (in dollars per share) | $ 168.82

X
- Definition The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (g) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(iii) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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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 -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (g) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition 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 -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition 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 Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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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 Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(1) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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