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Note 4 - Business Combinations (Details Textual) - USD ($)
3 Months Ended
Oct. 04, 2023
Dec. 31, 2023
Sep. 30, 2023
Share Price   $ 2.03  
Stock Issued During Period, Value, Acquisitions   $ 1,924,000  
Additional Paid-in Capital [Member]      
Stock Issued During Period, Value, Acquisitions   1,924,000  
Evertel Technologies, LLC [Member]      
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares) 986,486    
Share Price $ 1.95    
Business Combination, Acquisition Related Costs     $ 39,000
Finite-Lived Intangible Asset, Useful Life 6 years 9 months 18 days    
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual   209,000  
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual   $ 195,000  
Evertel Technologies, LLC [Member] | Additional Paid-in Capital [Member]      
Stock Issued During Period, Value, Acquisitions $ 1,924