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Note 10 - Common Stock Incentive, Stock Purchase Plans, and Other Compensation Plans (Tables) | 12 Months Ended
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Jun. 30, 2022
Notes Tables |
Share-Based Payment Arrangement, Option, Activity [Table Text Block] |
|  |  |  |  |  | Weighted |
|  | Shares |  |  | Average |
|  | (In thousands) |  |  | Exercise Price |
Outstanding at June 30, 2020 |  |  | 325 |  |  | $ | 5.68 |
Granted |  |  | 50 |  |  |  | 5.00 |
Exercised |  |  | — |  |  |  | — |
Canceled or expired |  |  | (100 | ) |  |  | 6.49 |
Outstanding at June 30, 2021 |  |  | 275 |  |  | $ | 5.25 |
Granted |  |  | 876 |  |  |  | 0.64 |
Exercised |  |  | — |  |  |  | — |
Canceled or expired |  |  | (122 | ) |  |  | 4.96 |
Outstanding at June 30, 2022 |  |  | 1,029 |  |  | $ | 1.35 |
Share-Based Payment Arrangement, Option, Exercise Price Range [Table Text Block] |
|  |  |  |  |  | Options |  |  |  |  |  |  |  |  |  |  |  |  |
|  |  |  |  |  | Outstanding |  |  |  |  |  |  |  |  |  |  | Options |
|  |  |  |  |  | Weighted- |  |  |  |  |  |  |  |  |  |  | Exercisable |
|  |  |  |  |  | Average |  |  | Weighted- |  |  |  |  |  |  | Weighted- |
|  | Number |  |  | Remaining |  |  | Average |  |  | Number |  |  | Average |
|  | Outstanding |  |  | Contractual |  |  | Exercise |  |  | Exercisable |  |  | Exercise |
Range of exercise prices |  | (In thousands) |  |  | Life (years) |  |  | Price |  |  | (In thousands) |  |  | Price |
$0.64 – $2.83 |  |  | 889 |  |  |  | 9.75 |  |  | $ | 0.66 |  |  |  | 9 |  |  | $ | 2.15 |
$5.30 – $5.85 |  |  | 88 |  |  |  | 4.86 |  |  |  | 5.55 |  |  |  | 88 |  |  |  | 5.55 |
$6.00 – $6.00 |  |  | 52 |  |  |  | 0.14 |  |  |  | 6.00 |  |  |  | 52 |  |  |  | 6.00 |
$0.64 – $6.00 |  |  | 1,029 |  |  |  | 8.84 |  |  | $ | 1.35 |  |  |  | 149 |  |  | $ | 5.49 |
Schedule of Nonvested Restricted Stock Units Activity [Table Text Block] |
|  |  |  |  |  | Weighted |
|  |  |  |  |  | Average |
|  | Shares |  |  | Grant-Date |
|  | (In thousands) |  |  | Fair Value |
Outstanding at June 30, 2020 |  |  | 133 |  |  | $ | 3.95 |
Granted |  |  | 2,019 |  |  |  | 2.02 |
Vested |  |  | (58 | ) |  |  | 1.84 |
Canceled or expired |  |  | (71 | ) |  |  | 3.57 |
Outstanding at June 30, 2021 |  |  | 2,023 |  |  | $ | 2.05 |
Granted |  |  | 1,200 |  |  |  | 0.63 |
Vested |  |  | (693 | ) |  |  | 2.08 |
Canceled or expired |  |  | (254 | ) |  |  | 2.02 |
Outstanding at June 30, 2022 |  |  | 2,276 |  |  | $ | 1.30 |
Schedule of Share-Based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block] |
|  | Year Ended |  |  | Year Ended |
|  | June 30, 2022 |  |  | June 30, 2021 |
Expected dividend yield |  |  | — |  |  |  | — |
Expected volatility |  |  | 104.97 | % |  |  | 106.29 | %
Risk-free interest rates |  |  | 0.65 | % |  |  | 1.45 | %
Expected option life (in years) |  |  | 3.5 |  |  |  | 3.5 |
Weighted-average grant-date fair value of options awarded |  | $ | 0.86 |  |  | $ | 2.40 |

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- Definition Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms. + 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 -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + 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 (d) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 Reference 3: 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) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of employee stock purchase plans, including, but not limited to: (a) expected term, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + 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 (f)(2) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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