XML 33 R21.htm IDEA: XBRL DOCUMENT v3.24.3
Note 1 - Organization and Summary of Significant Accounting Policies (Details Textual)
3 Months Ended 9 Months Ended 12 Months Ended
Mar. 08, 2024
USD ($)
$ / shares
Sep. 30, 2024
USD ($)
shares
Sep. 30, 2023
USD ($)
shares
Sep. 30, 2024
USD ($)
shares
Sep. 30, 2023
USD ($)
shares
Dec. 31, 2023
USD ($)
Oct. 04, 2024
$ / shares
Debt Conversion, Original Debt, Amount       $ 600,000 $ 0    
Stock Issued During Period, Shares, Conversion of Convertible Securities (in shares) | shares       335,195      
Number of Operating Segments       1      
Revenue from Contract with Customer, Excluding Assessed Tax   $ 1,957,500 $ 397,060 $ 2,678,013 $ 2,212,271    
Accounts Receivable, Allowance for Credit Loss   0   0   $ 0  
Deferred Tax Assets, Net   $ 17,700,000   $ 17,700,000   $ 16,400,000  
Deferred Tax Assets, Valuation Allowance Coverage, Percent       100.00%   100.00%  
Share-Based Payment Arrangement [Member]              
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) | shares   5,962,960 5,658,811 5,962,960 5,658,811    
Restricted Stock Units (RSUs) [Member]              
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) | shares   117,925 163,044 117,925 163,044    
Share-Based Payment Arrangement, Option [Member]              
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) | shares   5,845,035 5,495,767 5,845,035 5,495,767    
Customer Concentration Risk [Member] | Revenue Benchmark [Member]              
Concentration Risk, Number of Suppliers   10          
Concentration Risk, Number of Customers     7 16 13    
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Non-US [Member]              
Concentration Risk, Number of Customers   4 3 8 4    
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Two Significant Customers [Member]              
Concentration Risk, Number of Customers   2     2    
Revenue from Contract with Customer, Excluding Assessed Tax   $ 1,358,000   $ 1,450,000 $ 1,137,000    
Concentration Risk, Percentage   69.40%   54.10% 51.40%    
Concentration Risk, Significant Customers       2      
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Four Significant Customers [Member]              
Concentration Risk, Number of Customers     4        
Revenue from Contract with Customer, Excluding Assessed Tax     $ 297,000        
Concentration Risk, Percentage     74.80%        
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Four Customers [Member] | Non-US [Member]              
Revenue from Contract with Customer, Excluding Assessed Tax   $ 550,000     $ 314,000    
Concentration Risk, Percentage   28.10%     14.20%    
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Three Customers [Member] | Non-US [Member]              
Revenue from Contract with Customer, Excluding Assessed Tax     $ 127,000        
Concentration Risk, Percentage     32.00%        
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Seven Customers [Member] | Non-US [Member]              
Revenue from Contract with Customer, Excluding Assessed Tax       $ 854,000      
Concentration Risk, Percentage       31.90%      
Customer Concentration Risk [Member] | Accounts Receivable [Member]              
Concentration Risk, Number of Customers       9   13  
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Non-US [Member]              
Concentration Risk, Number of Customers       5   6  
Concentration Risk, Percentage       47.20%   45.60%  
Accounts Receivable, after Allowance for Credit Loss   $ 167,000   $ 167,000   $ 213,000  
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Four Customers [Member]              
Concentration Risk, Number of Customers       4   4  
Revenue from Contract with Customer, Excluding Assessed Tax       $ 262,000   $ 336,000  
Concentration Risk, Percentage       74.10%   72.00%  
Supplier Concentration Risk [Member] | Contract Research Organizations [Member] | Two CROs [Member]              
Concentration Risk, Number of Suppliers   2   2      
Concentration Risk, Percentage   94.60%   92.00%      
Research Services Purchased   $ 690,000   $ 1,647,000      
Supplier Concentration Risk [Member] | Contract Research Organizations [Member] | Three CROs [Member]              
Concentration Risk, Number of Suppliers     3   3    
Concentration Risk, Percentage     93.40%   96.40%    
Research Services Purchased     $ 977,000   $ 3,639,000    
Supplier Concentration Risk [Member] | Accounts Payable [Member] | Two CROs [Member]              
Concentration Risk, Number of Suppliers       2      
Concentration Risk, Percentage       60.80%      
Accounts Payable   $ 341,000   $ 341,000      
Supplier Concentration Risk [Member] | Accounts Payable [Member] | Three CROs [Member]              
Concentration Risk, Number of Suppliers           3  
Concentration Risk, Percentage           94.40%  
Accounts Payable           $ 620,000  
Conversion Of Convertible Notes Into Common Stock [Member]              
Debt Conversion, Original Debt, Amount       $ 600,000      
Senior Secured 2024 Notes [Member]              
Debt Instrument, Face Amount $ 6,000,000            
Debt Instrument, Interest Rate, Stated Percentage 8.00% 8.00%   8.00%      
Proceeds from Issuance of Senior Long-Term Debt $ 5,824,000            
Debt Instrument, Convertible, Conversion Price (in dollars per share) | $ / shares $ 1.4            
Stock Issued During Period, Shares, Conversion of Convertible Securities (in shares) | shares   223,463   335,195      
Senior Secured 2024 Notes [Member] | Subsequent Event [Member]              
Debt Instrument, Convertible, Conversion Price (in dollars per share) | $ / shares             $ 1.4