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Note 2 - Basis of Presentation and Significant Accounting Policies (Details Textual)
3 Months Ended 9 Months Ended 12 Months Ended
Aug. 02, 2024
USD ($)
shares
Apr. 26, 2024
USD ($)
Feb. 20, 2024
USD ($)
Sep. 06, 2023
USD ($)
shares
Aug. 14, 2023
USD ($)
shares
Jun. 01, 2022
USD ($)
Sep. 30, 2024
USD ($)
$ / shares
shares
Sep. 30, 2023
USD ($)
shares
Sep. 30, 2024
USD ($)
$ / shares
shares
Sep. 30, 2023
USD ($)
shares
Dec. 31, 2023
$ / shares
shares
Dec. 31, 2021
shares
Aug. 05, 2024
USD ($)
$ / shares
shares
Aug. 01, 2024
USD ($)
Jun. 30, 2024
USD ($)
Oct. 23, 2023
USD ($)
Sep. 05, 2023
Jun. 30, 2023
USD ($)
May 01, 2023
USD ($)
Aug. 11, 2022
USD ($)
Accounts Receivable Secured Debt Facility, Receivables Assigned             $ 0.5   $ 0.5                      
Accounts Receivable Secured Debt Facility, Amount Due             53   53                      
Contract with Customer, Liability, Revenue To Be Recognized                 0 $ 250,000                    
Contract with Customer, Liability             0 $ 0 $ 0 $ 0                    
Contract with Customer, Performance Obligation Satisfied in Previous Period             $ 0 $ 0                        
Weighted Average Number of Shares Outstanding, Basic (in shares) | shares             10,139,230 7,211,095 9,392,326 6,841,253                    
Preferred Stock, Shares Authorized (in shares) | shares             9,978,000   9,978,000   9,978,000   10,000,000              
Preferred Stock, Shares Outstanding (in shares) | shares             0   0   0                  
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares             $ 0.0001   $ 0.0001   $ 0.0001                  
Stock Issued During Period, Shares, New Issues (in shares) | shares                       5,524,534                
Proceeds from Issuance of Preferred Stock and Preference Stock $ 21,600,000                                      
Salem Loan Facility [Member]                                        
Stock Issued During Period, Shares, New Issues (in shares) | shares       660,000 400,000                              
Long-Term Line of Credit $ 4,500,000     $ 1,750,000 $ 1,500,000   $ 4,500,000   $ 4,500,000         $ 12,000,000 $ 12,000,000 $ 1,250,000   $ 5,500,000 $ 1,500,000 $ 5,000,000
Debt Instrument, Interest Rate, Stated Percentage         14.00%   14.00%   14.00%         14.00%     14.00%      
Debt Instrument, Interest Rate, Stated Percentage, Paid in Kind             3.00%   3.00%         3.00%            
Debt Instrument, Interest Rate, Stated Percentage, Paid in Cash 12.00%           11.00%   11.00%         11.00%            
Preferred Stock [Member]                                        
Stock Issued During Period, Shares, New Issues (in shares) | shares 22,000                                      
Gallium Semiconductor's GaN Power Amplifiers and Front-end Modules [Member]                                        
Asset Acquisition, Consideration Transferred   $ 400,000                                    
Finite-Lived Intangible Assets Acquired   $ 400,000                                    
Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life (Year)   10 years                                    
Series A Convertible Preferred Stock [Member]                                        
Preferred Stock, Shares Outstanding (in shares) | shares             22,000   22,000   0   22,000              
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares                         $ 0.0001              
Preferred Stock, Stated Value                         $ 1,000              
Preferred Stock, Convertible, Shares Issuable (in shares) | shares                         7,213,115              
Spectrum Loan Facility [Member]                                        
Proceeds from Accounts Receivable Factoring     $ 3,750,000     $ 3,000,000                            
Long-Term Line of Credit             $ 500,000   $ 500,000                      
Customer Concentration Risk [Member] | Revenue Benchmark [Member]                                        
Number of Major Customers                 1 1                    
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | One Customer [Member]                                        
Concentration Risk, Percentage                 78.00% 81.00%                    
Customer Concentration Risk [Member] | Accounts Receivable [Member] | One Customer [Member]                                        
Concentration Risk, Percentage                 71.00%   81.00%