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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