v3.26.1
Note 13 - Equity Offerings (Details Textual)
 1 Months Ended 6 Months Ended 12 Months Ended
Apr. 21, 2026
USD ($)
shares
Mar. 31, 2026
USD ($)
$ / shares
Mar. 09, 2026
USD ($)
shares
Mar. 09, 2026
shares
Feb. 06, 2026
USD ($)
$ / shares
shares
May 12, 2025
USD ($)
$ / shares
shares
Mar. 31, 2026
USD ($)
$ / shares
shares
Feb. 28, 2026
USD ($)
$ / shares
shares
Jun. 30, 2026
USD ($)
$ / shares
Jun. 30, 2025
USD ($)
Dec. 31, 2025
USD ($)
$ / shares
shares
Feb. 05, 2026
Aug. 15, 2025
$ / shares
Aug. 07, 2025
USD ($)
Jun. 13, 2025
USD ($)
May 19, 2025
USD ($)
$ / shares
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares                 $ 0.0001   $ 0.0001          
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares                 $ 0.0001   $ 0.0001   $ 0.0001      
Proceeds from Warrant Exercises                 $ 401,000 $ 0            
Accrued Liabilities, Current                 $ 1,982,000   $ 1,697,000          
Weighted Average [Member]                                
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares                 $ 19.42              
Series L Warrants [Member]                                
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares         $ 1.78                      
Maximum Beneficial Ownership         9.99%             4.99%        
Stock Issued During Period, Shares, Exercise of Warrants (in shares) | shares         225,564                      
Proceeds from Warrant Exercises         $ 400                      
Series M Warrants [Member]                                
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares                 1.56              
Warrants and Rights Outstanding, Term (Year)                     5 years 6 months          
Series B Convertible Preferred Stock [Member]                                
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares           $ 0.0001                    
Maximum Beneficial Ownership         9.99%             4.99%        
Series C1 Convertible Preferred Stock [Member]                                
Stock Issued During Period, Shares, New Issues (in shares) | shares             1,853 1,617                
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares                 0.0001              
Series C2 Convertible Preferred Stock [Member]                                
Stock Issued During Period, Shares, New Issues (in shares) | shares 1,617     3,470                        
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares                 $ 0.0001              
Proceeds from Issuance of Preferred Stock and Preference Stock $ 1,600,000                              
Series C4 Convertible Preferred Stock [Member]                                
Stock Issued During Period, Shares, New Issues (in shares) | shares 1,853                              
Proceeds from Issuance of Preferred Stock and Preference Stock $ 1,900,000                              
May 2025 PIPE Financing [Member]                                
Proceeds from Issuance or Sale of Equity           $ 1,500,000                    
Payments of Stock Issuance Costs           $ 400,000                    
Warrant, Exercisable Minimum Share Price (in dollars per share) | $ / shares           $ 28.5                    
Maximum Beneficial Ownership           4.99%                    
Maximum Beneficial Ownership, With Notice           9.99%                    
Failure to Register Penalty, Percentage of Subscription Amount Every Thirty Days           2.00%                    
Failure to Register Penalty, Interest on Unpaid Amount           18.00%                    
May 2025 PIPE Financing [Member] | Series L Warrants [Member]                                
Warrants and Rights Outstanding, Term (Year)           5 years 6 months                    
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares) | shares           1                    
Class of Warrant or Right, Callable, Price Per Share (in dollars per share) | $ / shares           $ 0.19                    
May 2025 PIPE Financing [Member] | Placement Agent Warrants [Member]                                
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares           13,534                    
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares           $ 10.3075                    
Warrants and Rights Outstanding, Term (Year)           5 years                    
May 2025 PIPE Financing [Member] | QHS Lab Note [Member]                                
Debt Instrument, Fair Value Disclosure           $ 864,000                    
May 2025 PIPE Financing [Member] | PIPE Units [Member]                                
Stock Issued During Period, Shares, New Issues (in shares) | shares           1,500                    
May 2025 PIPE Financing [Member] | Series B Convertible Preferred Stock [Member]                                
Stock Issued During Period, Shares, New Issues (in shares) | shares           1,500                    
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares           $ 0.0001                    
Units Issued, Shares Per Unit           1                    
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares           150                    
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares           $ 9.5                    
ATM Offering [Member]                                
Stock Issued During Period, Shares, New Issues (in shares) | shares                     887,852          
Payments of Stock Issuance Costs                     $ 300,000          
Equity, Issuable, Maximum Issuance Value                           $ 4,300,000 $ 3,200,000 $ 1,300,000
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares                               $ 0.0001
Commission Fee, Percent of Gross Proceeds                             3.00%  
Proceeds from Issuance of Common Stock                     4,000,000          
Private Placement [Member]                                
Stock Issued During Period, Shares, New Issues (in shares) | shares         392,608     392,608                
Proceeds from Issuance or Sale of Equity         $ 2,200,000     $ 2,200,000                
Payments of Stock Issuance Costs         $ 200,000     $ 200,000                
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares         $ 0.0001     $ 0.0001                
Shares Issued, Price Per Share (in dollars per share) | $ / shares         $ 1.43     $ 1.43                
Private Placement [Member] | Series C1 Convertible Preferred Stock [Member]                                
Stock Issued During Period, Shares, New Issues (in shares) | shares     1,853   1,617     1,617                
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares         $ 0.0001                      
Payments of Stock Issuance Costs     $ 100,000                          
Private Placement [Member] | Series C2 and C3 Convertible Preferred Stock [Member]                                
Stock Issued During Period, Shares, New Issues (in shares) | shares             1,617                  
Proceeds from Issuance or Sale of Equity             $ 1,600,000                  
Maximum Value of Shares Issuable   $ 39,200,000         39,200,000                  
Private Placement [Member] | Series C2 and C3 Convertible Preferred Stock [Member] | Minimum [Member]                                
Proceeds from Issuance or Sale of Equity             $ 500,000                  
Private Placement [Member] | Series C2 Convertible Preferred Stock [Member]                                
Stock Issued During Period, Shares, New Issues (in shares) | shares 3,470                              
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares         0.0001                      
Payments of Stock Issuance Costs $ 300,000                              
Private Placement [Member] | Series C4 Convertible Preferred Stock [Member]                                
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares         $ 0.0001                      
Maximum Value of Shares Issuable         $ 39,200,000                      
March 2026 SPA [Member] | Series C1 Convertible Preferred Stock [Member]                                
Stock Issued During Period, Shares, New Issues (in shares) | shares             1,853                  
Proceeds from Issuance or Sale of Equity             $ 1,900,000                  
Payments of Stock Issuance Costs             $ 100,000                  
March 2026 SPA [Member] | Series C2 and C3 Convertible Preferred Stock [Member]                                
Stock Issued During Period, Shares, New Issues (in shares) | shares             1,853                  
Proceeds from Issuance or Sale of Equity             $ 1,900,000                  
March 2026 SPA [Member] | Series C4 Convertible Preferred Stock [Member]                                
Proceeds from Issuance or Sale of Equity   500,000                            
Maximum Value of Shares Issuable   $ 39,200,000         $ 39,200,000                  
Preferred Stock, Par Value Per Share (in dollars per share) | $ / shares   $ 0.0001         $ 0.0001                  
Preferred Stock, Stated Value Per Share (in dollars per share) | $ / shares   $ 1,000         $ 1,000                  
The 2022 Offering [Member]                                
Accrued Liabilities, Current                 $ 1,400,000   $ 1,400,000