v3.26.1
Note 6 - Stockholders' Equity and Equity-linked Instruments (Details Textual)
 1 Months Ended 3 Months Ended 6 Months Ended
Jun. 03, 2026
USD ($)
shares
May 01, 2026
USD ($)
$ / shares
shares
Jan. 16, 2026
$ / shares
Oct. 22, 2025
USD ($)
$ / shares
shares
Jul. 10, 2025
USD ($)
$ / shares
shares
May 30, 2025
USD ($)
$ / shares
shares
May 29, 2025
USD ($)
$ / shares
shares
May 14, 2025
USD ($)
$ / shares
shares
May 12, 2025
USD ($)
$ / shares
May 09, 2025
$ / shares
shares
Feb. 14, 2025
USD ($)
shares
Sep. 30, 2024
USD ($)
$ / shares
shares
Jun. 30, 2026
USD ($)
$ / shares
shares
Jun. 30, 2025
USD ($)
$ / shares
shares
Jun. 30, 2026
USD ($)
$ / shares
shares
Jun. 30, 2025
USD ($)
$ / shares
shares
May 30, 2026
Dec. 31, 2025
$ / shares
shares
Placement Agent Fee, Percentage                                 8.00%  
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares   $ 0.001 $ 0.001                   $ 0.001   $ 0.001     $ 0.001
Deferred Debt Issuance Cost, Writeoff                         $ 825,000 $ (0) $ 825,000 $ (0)    
Write-Off Noncash Deferred Financing Costs                             $ 600,000 0    
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares       $ 0.001                 $ 0.001   $ 0.001     $ 0.001
Preferred Stock, Shares Issued (in shares) | shares                         0   0     98,636
Preferred Stock, Shares Outstanding (in shares) | shares                         0   0     98,636
Preferred Stock, Stated Value       $ 1,000                            
Deemed Dividend on Preferred Stock                         $ 427,000 0 $ 427,000 0    
Fair Value Adjustment of Warrants                         $ (0) $ (144,000) $ (4,000) $ (861,000)    
Series C Preferred Stock [Member]                                    
Preferred Stock, Shares Issued (in shares) | shares                                   1,153
Preferred Stock, Shares Outstanding (in shares) | shares                                   1,153
Series C Preferred Stock [Member] | YP Exchange Agreement [Member]                                    
Shares Designated | shares       4,700                            
Preferred Stock, Convertible, Conversion Price, At Issuance | $ / shares       $ 12                            
Pre-Funded Warrant [Member]                                    
Shares Issued, Price Per Share | $ / shares           $ 4.79                        
Class of Warrant or Right, Issued During Period | shares         14,419 59,833                        
Class of Warrant or Right, Issued During Period, Exercise Price | $ / shares           $ 0.00001                        
Class of Warrant or Right, Grant Date Fair Value | $ / shares         $ 0.001                          
Class of Warrant or Right, Number of Securities Called by Warrants or Rights | shares                         1,398,173 0 1,398,173 0    
Series AAA-3 and AAA-4 Junior Preferred Stock Warrants [Member]                                    
Fair Value Adjustment of Warrants                           $ 58,000   $ 328,000    
Warrants Issued With Placement Agent Agreement [Member]                                    
Fair Value Adjustment of Warrants                         $ 0 $ (86,000) $ (4,000) $ (533,000)    
Pipe October 2025 Warrants [Member]                                    
Class of Warrant or Right, Number of Securities Called by Warrants or Rights | shares   2,700,000                                
Pipe October 2025 Warrants [Member] | Minimum [Member]                                    
Warrant Floor Price | $ / shares   $ 4.99                                
Pipe October 2025 Warrants [Member] | Maximum [Member]                                    
Warrant Floor Price | $ / shares   $ 6.84                                
Misfits Warrant [Member] | Misfits Purchase Agreement [Member]                                    
Fair Value Adjustment of Warrants   $ 1,002,000                                
Misfits Warrant [Member] | Misfits Purchase Agreement [Member] | Measurement Input, Risk Free Interest Rate [Member]                                    
Warrants and Rights Outstanding, Measurement Input   0.0397                                
Misfits Warrant [Member] | Minimum [Member] | Misfits Purchase Agreement [Member] | Measurement Input, Share Price [Member]                                    
Warrants and Rights Outstanding, Measurement Input   4.99                                
Misfits Warrant [Member] | Minimum [Member] | Misfits Purchase Agreement [Member] | Measurement Input, Price Volatility [Member]                                    
Warrants and Rights Outstanding, Measurement Input   1.03                                
Misfits Warrant [Member] | Minimum [Member] | Misfits Purchase Agreement [Member] | Measurement Input, Expected Term [Member]                                    
Warrants and Rights Outstanding, Measurement Input   4.46                                
Misfits Warrant [Member] | Maximum [Member] | Misfits Purchase Agreement [Member] | Measurement Input, Share Price [Member]                                    
Warrants and Rights Outstanding, Measurement Input   12                                
Misfits Warrant [Member] | Maximum [Member] | Misfits Purchase Agreement [Member] | Measurement Input, Price Volatility [Member]                                    
Warrants and Rights Outstanding, Measurement Input   1.05                                
Misfits Warrant [Member] | Maximum [Member] | Misfits Purchase Agreement [Member] | Measurement Input, Expected Term [Member]                                    
Warrants and Rights Outstanding, Measurement Input   4.51                                
May III Purchase Agreement [Member]                                    
Stock Issued During Period, Shares, New Issues | shares           79,750                        
Shares Issued, Price Per Share | $ / shares           $ 4.8                        
Proceeds from Issuance or Sale of Equity           $ 670,000                        
May II Underwriting Agreement [Member]                                    
Stock Issued During Period, Shares, New Issues | shares             10,417                      
Shares Issued, Price Per Share | $ / shares             $ 4.8                      
Equity Offering, Maximum Shares to be Issued | shares             104,167                      
Proceeds from Issuance of Common Stock             $ 380,000                      
May II Over Allotment Option [Member]                                    
Option, Period             45 days                      
Stock Issuable During Period | shares             10,417                      
Underwriting Agreement [Member]                                    
Shares Issued, Price Per Share | $ / shares                 $ 6.8                  
Equity Offering, Maximum Shares to be Issued | shares                   127,941                
Proceeds from Issuance of Common Stock                 $ 700,400                  
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares                   $ 0.001                
Over-Allotment Option [Member]                                    
Shares Issued, Price Per Share | $ / shares               $ 6.8                    
Option, Period                   45 days                
Stock Issuable During Period | shares               15,441   19,191                
Proceeds from Issuance of Common Stock               $ 104,999                    
Equity Purchase Agreement [Member]                                    
Stock Issued During Period, Shares, New Issues | shares                     625     1,494        
Shares Issued, Price Per Share | $ / shares                           $ 163.2   $ 163.2    
Proceeds from Issuance of Common Stock                           $ 231,000        
Equity Offering, Maximum Amount         $ 20,000,000           $ 2,900,000              
Stock Issued During Period, Value, New Issues         $ 600,000           $ 159,000              
Series C Purchase Agreement [Member]                                    
Deferred Debt Issuance Cost, Writeoff                             $ 825,000      
Write-Off Noncash Deferred Financing Costs $ 600,000                                  
Stock Repurchased During Period, Value $ 922,400                                  
Stock Repurchased During Period, Shares | shares 1,153                                  
Deemed Dividend on Preferred Stock $ 427,000                                  
Series AAA-3 & AAA-4 Junior Subscription Agreements [Member]                                    
Stock Issued During Period, Shares, New Issues | shares                       1,096            
Proceeds from Issuance or Sale of Equity                       $ 1,096,000            
Series AAA-3 & AAA-4 Junior Subscription Agreements [Member] | Series AAA-3 and AAA-4 Junior Preferred Stock Warrants [Member]                                    
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right | shares                       3            
Class of Warrant or Right, Issued During Period, Purchase Price | $ / shares                       $ 1,000            
Pipe Purchase Agreement [Member]                                    
Stock Issued During Period, Shares, New Issues | shares       332,084                            
Shares Issued, Price Per Share | $ / shares       $ 12                            
Proceeds from Issuance or Sale of Equity       $ 20,000,000                            
Reverse Stock Split [Member]                                    
Stockholders' Equity Note, Stock Split, Conversion Ratio     12