Quarterly report pursuant to Section 13 or 15(d)

Note 2 - Summary of Significant Accounting Policies (Details Textual)

v3.24.3
Note 2 - Summary of Significant Accounting Policies (Details Textual)
3 Months Ended 9 Months Ended 12 Months Ended
Nov. 14, 2024
USD ($)
Nov. 08, 2024
USD ($)
Oct. 24, 2024
USD ($)
$ / shares
shares
Sep. 30, 2023
USD ($)
May 01, 2023
USD ($)
$ / shares
shares
Apr. 30, 2023
USD ($)
$ / shares
shares
Jan. 01, 2022
$ / shares
shares
Sep. 30, 2024
USD ($)
$ / shares
shares
Sep. 30, 2023
USD ($)
shares
Sep. 30, 2024
USD ($)
$ / shares
shares
Sep. 30, 2023
USD ($)
shares
Dec. 31, 2023
USD ($)
$ / shares
Mar. 19, 2024
$ / shares
shares
Dec. 31, 2022
USD ($)
Retained Earnings (Accumulated Deficit)               $ (263,651,000)   $ (263,651,000)   $ (249,014,000)    
Net Cash Provided by (Used in) Operating Activities                   (8,160,000) $ (14,090,000)      
Cash and Cash Equivalents, at Carrying Value               $ 289,000   $ 289,000   $ 7,609,000    
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares               $ 0.001   $ 0.001   $ 0.001    
Contract with Customer, Asset, after Allowance for Credit Loss               $ 642,000   $ 642,000   $ 546,000   $ 1,013,000
Contract with Customer, Liability               154,000   154,000   339,000   $ 111,000
Advertising Expense               0 $ 28,000 56,000 50,000      
Accounts Receivable, Allowance for Credit Loss, Current               $ 200,000   $ 200,000   0    
Finite-Lived Intangible Asset, Useful Life               5 years   5 years        
Number of Reporting Units                   1        
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Contingent to be Issued (in shares) | shares                         1,692,606  
Share-Based Payment Arrangement, Expense               $ 356,000 643,000 $ 986,000 2,175,000      
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period | shares         29,224 58,951                
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price | $ / shares           $ 56.4                
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross | shares         63,900 305,000                
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price | $ / shares         $ 9.81 $ 9.8                
Deferred Costs, Current               184,000   $ 184,000   282,000    
Number of Reportable Segments         1         1        
Deemed Dividend on Preferred Stock               $ (0) $ 6,446,000   $ 6,446,000      
Series A A Preferred Stock [Member]                            
Deemed Dividend on Preferred Stock       $ 6,446,000               6,446,000    
Common Stock Underlying All Outstanding Stock Option, Restricted Stock Units and Warrants [Member]                            
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) | shares                   3,782,000 1,044,000      
Convertible Debt Securities [Member]                            
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) | shares                   11,346,000 4,077,000      
Common Stock Potentially Issuable in Connection With The Exercise of Outstanding Additional Investment Rights [Member]                            
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) | shares               8,414,000 1,682,000          
Share-Based Payment Arrangement, Option [Member]                            
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Contingent to be Issued (in shares) | shares                         846,303  
Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Contingent to be Issued, Exercisable Price (in dollars per share) | $ / shares                         $ 1.85  
Share-Based Payment Arrangement, Option [Member] | Share-Based Payment Arrangement, Tranche One [Member]                            
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage           33.33%                
Restricted Stock Units (RSUs) [Member]                            
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Contingent to be Issued (in shares) | shares                         846,303  
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Granted (in shares) | shares         103,780                  
Restricted Stock Units (RSUs) [Member] | Share-Based Payment Arrangement, Tranche Two [Member]                            
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage of EBITDA for Next Year                         85.00%  
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Granted (in shares) | shares         62,268                  
Original PSUs [Member]                            
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Granted (in shares) | shares             67,500              
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting, Number of Shares Required Vested (in shares) | shares             13,500              
Share-Based Payment Arrangement, Expense                 $ 0   $ 298,000      
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period | shares           67,500                
Original PSUs [Member] | Share-Based Payment Arrangement, Tranche Two [Member]                            
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Requirement, Stock Price (in dollars per share) | $ / shares             $ 120              
Original PSUs [Member] | Share-Based Payment Arrangement, Tranche One [Member]                            
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Requirement, Stock Price (in dollars per share) | $ / shares             95              
Original PSUs [Member] | Share-Based Payment Arrangement, Tranche Three [Member]                            
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Requirement, Stock Price (in dollars per share) | $ / shares             140              
Original PSUs [Member] | Share-Based Payment Arrangement, Tranche Four [Member]                            
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Requirement, Stock Price (in dollars per share) | $ / shares             160              
Original PSUs [Member] | Share-Based Payment Arrangement, Tranche Five [Member]                            
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Requirement, Stock Price (in dollars per share) | $ / shares             $ 180              
Performance Shares [Member]                            
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Granted (in shares) | shares           67,500                
Share-Based Payment Arrangement, Expense               $ 28,000 131,000 $ 125,000 220,000      
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period           5 years                
Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount           $ 540,000                
Performance Shares [Member] | Share-Based Payment Arrangement, Tranche Two [Member]                            
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Requirement, Stock Price (in dollars per share) | $ / shares           $ 20                
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage           20.00%                
Performance Shares [Member] | Share-Based Payment Arrangement, Tranche One [Member]                            
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Requirement, Stock Price (in dollars per share) | $ / shares           $ 16                
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage           20.00%                
Performance Shares [Member] | Share-Based Payment Arrangement, Tranche Three [Member]                            
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Requirement, Stock Price (in dollars per share) | $ / shares           $ 24                
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage           20.00%                
Performance Shares [Member] | Share-Based Payment Arrangement, Tranche Four [Member]                            
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Requirement, Stock Price (in dollars per share) | $ / shares           $ 28                
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage           20.00%                
Performance Shares [Member] | Share-Based Payment Arrangement, Tranche Five [Member]                            
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Requirement, Stock Price (in dollars per share) | $ / shares           $ 32                
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage           20.00%                
Stock Warrants [Member]                            
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period | shares           26,100                
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value | $ / shares           $ 199.8                
Executive Grant Modifications [Member]                            
Share-Based Payment Arrangement, Expense           $ 112,000   54,000 132,000 162,000        
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition           3 years                
Total Compensation Costs, Recognized and Not Yet Recognized           $ 347,000                
Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount           $ 235,000                
Employee Grant Modifications [Member]                            
Share-Based Payment Arrangement, Expense               $ 39,000 $ 56,000 $ 135,000 $ 224,000 $ 101,000    
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition         4 years             4 years    
Total Compensation Costs, Recognized and Not Yet Recognized                       $ 449,000    
Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount         $ 960,000             $ 348,000    
Minimum [Member]                            
Finite-Lived Intangible Asset, Useful Life               3 years   3 years        
Minimum [Member] | Performance Shares [Member]                            
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition           8 months 8 days                
Maximum [Member]                            
Finite-Lived Intangible Asset, Useful Life               10 years   10 years        
Maximum [Member] | Performance Shares [Member]                            
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition           1 year 6 months                
Subsequent Event [Member] | Agile Loan Agreement [Member]                            
Debt Instrument, Face Amount   $ 1,850,000                        
Debt Instrument, Term   196 days                        
Interest Expense, Short-Term Borrowings   $ 780,000                        
Debt Instrument, Periodic Payment $ 93,821                          
Registered Direct Offering [Member] | Subsequent Event [Member]                            
Common Stock, Maximum Shares Sold | shares     1,136,364                      
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares     $ 0.001                      
Sale of Stock, Price Per Share | $ / shares     $ 0.88                      
Proceeds from Issuance of Common Stock     $ 1,000,000