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Note 10 - Significant Customers / Concentration / Disaggregated Revenue - Concentration of Risk (Details) - Customer Concentration Risk [Member]
3 Months Ended 12 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Dec. 31, 2023
Revenue Benchmark [Member] | Customer A [Member]      
Concentration Risk, Percentage 22.00% 0.00%  
Accounts Receivable [Member] | Customer B [Member]      
Concentration Risk, Percentage 20.00%   22.00%
Accounts Receivable [Member] | Customer C [Member]      
Concentration Risk, Percentage     13.00%