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Note 2 - Collaborative Arrangements and Contracts With Customers (Details Textual)
3 Months Ended 6 Months Ended
Jun. 30, 2024
USD ($)
Jun. 30, 2023
Jun. 30, 2024
USD ($)
Jun. 30, 2023
USD ($)
Dec. 31, 2023
USD ($)
Accounts Receivable, after Allowance for Credit Loss, Current $ 387,040   $ 387,040   $ 333,697
Accounts Receivable, Allowance for Credit Loss, Current 0   0   0
Contract with Customer, Liability 283,604   283,604   $ 313,550
Contract with Customer, Liability, Revenue Recognized $ 49,165   $ 66,139    
Revenue Benchmark [Member] | Customer Concentration Risk [Member]          
Number of Customers   3   3  
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Customer One [Member]          
Concentration Risk, Percentage 11.00% 11.00%   10.00%  
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Customer Two [Member]          
Concentration Risk, Percentage 11.00% 15.00%   12.00%  
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Customer Three [Member]          
Concentration Risk, Percentage 12.00% 24.00%   16.00%  
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Single Customer [Member]          
Concentration Risk, Percentage     34.00%    
Cancer Research Horizons [Member] | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement [Member]          
Revenue from Collaborative Arrangement, Excluding Revenue from Contract with Customer     $ 0 $ 0