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Note 1 - General Information (Details Textual) shares in Thousands | Dec. 05, 2022 shares | Mar. 31, 2024 $ / shares | Jun. 30, 2023 $ / shares
--- | --- | --- | ---
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares |  | $ 0.001 | $ 0.001
Stock Issued During Period, Shares, Reverse Stock Splits (in shares) | shares | 0 |  |
Number of Patents Granted |  | 17 |
Number of Locations using TRACER 1000 |  | 30 |
Reverse Stock Split [Member] |  |  |
Stockholders' Equity Note, Stock Split, Conversion Ratio | 30 |  |

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- Definition Face amount or stated value per share of common stock. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
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