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Note 12 - Significant Payors (Details Textual) - ILLINOIS
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
Geographic Concentration Risk [Member] | Revenue from Contract with Customer Benchmark [Member]          
Concentration Risk, Percentage 33.00% 38.60% 33.00% 38.50%  
Customer Concentration Risk [Member] | Revenue from Contract with Customer Benchmark [Member]          
Concentration Risk, Percentage 18.60% 21.10% 18.60% 20.90%  
Customer Concentration Risk [Member] | Accounts Receivable [Member]          
Concentration Risk, Percentage     19.00%   21.70%