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Note 3 - Acquisition of Amorphous Materials (Details Textual) - USD ($) |  |  |  | 2 Months Ended | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Mar. 10, 2026 | Jan. 21, 2026 | Jan. 20, 2026 | Mar. 31, 2026 | Mar. 31, 2026 | Mar. 31, 2026 | Mar. 31, 2025 | Jun. 30, 2025 | Feb. 18, 2025
Common Stock, Par or Stated Value Per Share (in dollars per share) |  | $ 544,000 |  | $ 0.01 | $ 0.01 | $ 0.01 |  | $ 0.01 |
Share Price (in dollars per share) |  | $ 13.64 |  |  |  |  |  |  | $ 2.47
Goodwill |  |  |  | $ 19,315,177 | $ 19,315,177 | $ 19,315,177 |  | $ 13,753,921 |
Amorphous Materials, LLC (“AML”) [Member] |  |  |  |  |  |  |  |  |
Business Combination, Consideration Transferred |  | $ 9,168,912 |  |  |  |  |  |  |
Payments to Acquire Businesses, Gross |  | $ 7,000,111 | $ 7,000,000 |  |  | 7,000,111 | $ (0) |  |
Business Combination, Contingent Consideration, Range of Outcomes, Maximum, Amount |  |  | 3,000,000 |  |  |  |  |  |
Stock Issued During Period, Value, Acquisitions |  |  |  |  | 1,027,080 |  |  |  |
Business Combination, Consideration Transferred, Equity Interest, Share Issued, Number of Shares (in shares) |  | 39,897 |  |  |  |  |  |  |
Goodwill |  | $ 5,600,000 |  | 5,561,256 | 5,561,256 | 5,561,256 |  |  |
Business Combination, Acquiree's Revenue since Acquisition Date, Actual |  |  |  | 1,000,000 |  |  |  |  |
Business Combination, Acquiree's Earnings (Loss) since Acquisition Date, Actual |  |  |  | $ 300,000 |  |  |  |  |
Business Combination, Acquisition-Related Cost, Expense |  |  |  |  | $ 100,000 | $ 200,000 |  |  |
Amorphous Materials, LLC (“AML”) [Member] | Class A Common Stock Per Tranche [Member] |  |  |  |  |  |  |  |  |
Business Combination, Contingent Consideration, Liability |  |  | $ 500,000 |  |  |  |  |  |
Amorphous Materials, LLC (“AML”) [Member] | Contingent Consideration Payments, Class A Common Stock [Member] |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, Acquisitions (in shares) | 43,621 |  | 39,897 |  |  |  |  |  |
Stock Issued During Period, Value, Acquisitions | $ 482,000 |  | $ 544,000 |  |  |  |  |  |
Amorphous Materials, LLC (“AML”) [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |
Business Combination, Consideration Transferred |  |  | $ 10,000,000 |  |  |  |  |  |

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