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Note 4 - Acquisition of G5 Infrared (Details Textual) - USD ($) |  |  | 3 Months Ended | 9 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Feb. 18, 2025 | Feb. 13, 2025 | Mar. 31, 2026 | Mar. 31, 2025 | Mar. 31, 2026 | Mar. 31, 2025 | Apr. 16, 2026 | Jan. 21, 2026 | Dec. 31, 2025 | Jun. 30, 2025
Share Price (in dollars per share) | $ 2.47 |  |  |  |  |  |  | $ 13.64 |  |
Business Combination, Contingent Consideration, Change in Contingent Consideration, Liability, Increase (Decrease) |  |  | $ 3,393,000 | $ 130,445 | $ 12,234,529 | $ 130,445 |  |  |  |
Goodwill |  |  | $ 19,315,177 |  | $ 19,315,177 |  |  |  |  | $ 13,753,921
Series G Convertible Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |
Preferred Stock, Par or Stated Value Per Share (in dollars per share) |  |  | $ 1,000 |  | $ 1,000 |  |  |  |  |
Preferred Stock, Convertible, Conversion Price (in dollars per share) |  |  | $ 2.15 |  | $ 2.15 |  |  |  |  |
Series G Purchasers [Member] | Series G Purchasers Warrants [Member] |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) |  | 4,352,774 |  |  |  |  |  |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) |  | $ 2.58 |  |  |  |  |  |  |  |
Series G Purchasers [Member] | Series G Convertible Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues (in shares) |  | 24,956 |  |  |  |  |  |  |  |
Preferred Stock, Par or Stated Value Per Share (in dollars per share) |  | $ 1,000 |  |  |  |  |  |  |  |
Preferred Stock, Dividend Rate, Percentage |  | 6.50% |  |  |  |  |  |  |  |
Preferred Stock, Convertible, Conversion Price (in dollars per share) |  | $ 2.15 |  |  |  |  |  |  |  |
Acquisition Notes [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument, Face Amount |  | $ 5,200,000 |  |  |  |  |  |  |  |
Proceeds from Issuance of Debt |  | 32,200,000 |  |  |  |  |  |  |  |
Payments of Debt Issuance Costs |  | $ 2,200,000 |  |  |  |  |  |  |  |
G5 Infrared [Member] |  |  |  |  |  |  |  |  |  |
Business Combination, Consideration Transferred | $ 27,130,195 |  |  |  |  |  |  |  |  |
Payments to Acquire Businesses, Gross | 20,250,000 |  |  |  | $ (0) | 20,250,011 |  |  |  |
Business Combination, Acquiree's Minimum Revenue for Clawback Provision | 17,300,000 |  |  |  |  |  |  |  |  |
Business Combination, Aggregate Earnout Payments | $ 23,000,000 |  |  |  |  |  |  |  |  |
Business Combination, Aggregate Common Stock Issued, Percent | 30.00% |  |  |  |  |  |  |  |  |
Business Combination, Additional Cash Consideration, Percent of Earnout Payment | 70.00% |  |  |  |  |  |  |  |  |
Payment for Contingent Consideration Liability, Financing Activities |  |  |  |  | 3,536,471 | (0) |  |  |  |
Stock Issued During Period, Value, Acquisitions |  |  | $ 3,149,942 | 4,872,068 |  |  |  |  |  |
Business Combination, Recognized Liability Assumed, Deferred Tax Liability |  |  |  | 1,174,650 |  | 1,174,650 |  |  | $ 100,000 | 136,982
Goodwill |  |  |  | $ 2,977,344 |  | $ 2,977,344 |  |  | $ 7,000,000 | $ 6,989,794
G5 Infrared [Member] | Earnout [Member] |  |  |  |  |  |  |  |  |  |
Payment for Contingent Consideration Liability, Financing Activities |  |  | 7,300,000 |  |  |  |  |  |  |
Stock Issued During Period, Value, Acquisitions |  |  | $ 3,200,000 |  |  |  |  |  |  |
Stock Issued During Period, Shares, Acquisitions (in shares) |  |  | 297,445 |  |  |  |  |  |  |
Business Combination, Contingent Consideration, Liability |  |  | $ 6,700,000 |  | 6,700,000 |  |  |  |  |
Business Combination, Contingent Consideration, Change in Contingent Consideration, Liability, Increase (Decrease) |  |  |  |  | $ 12,200,000 |  |  |  |  |
G5 Infrared [Member] | Earnout [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |
Business Combination, Contingent Consideration, Liability |  |  |  |  |  |  | $ 9,000,000 |  |  |
G5 Infrared [Member] | Earnout to be Paid in Cash [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |
Business Combination, Contingent Consideration, Liability |  |  |  |  |  |  | 6,300,000 |  |  |
G5 Infrared [Member] | Earnout to be Paid in Shares [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |
Business Combination, Contingent Consideration, Liability |  |  |  |  |  |  | $ 2,700,000 |  |  |
G5 Infrared [Member] | Common Stock [Member] |  |  |  |  |  |  |  |  |  |
Business Combination, Consideration Transferred, Equity Interest, Share Issued, Number of Shares (in shares) | 1,972,501 |  |  |  |  |  |  |  |  |

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