v3.26.1
Note 2 - Summary of Significant Accounting Policies (Details Textual) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Debt, Current $ 28.7   $ 28.7    
Line of Credit, Current 22.7   22.7    
Notes Payable, Current 6.0   6.0    
Interest Payable $ 6.3   $ 6.3    
Revenue Benchmark [Member] | Product Concentration Risk [Member] | Cincinnati [Member]          
Concentration Risk, Percentage     21.00%   20.00%
Revenue Benchmark [Member] | Product Concentration Risk [Member] | Chicago [Member]          
Concentration Risk, Percentage     11.50%   11.00%
Revenue Benchmark [Member] | Product Concentration Risk [Member] | Detroit [Member]          
Concentration Risk, Percentage     10.20%   9.80%
Revenue Benchmark [Member] | Product Concentration Risk [Member] | Parking Facilities, Operator, Metropolis Technologies Inc. [Member]          
Concentration Risk, Percentage 62.40% 59.60% 62.20% 56.20%  
Revenue Benchmark [Member] | Product Concentration Risk [Member] | Parking Facilities, Operator, LAZ Parking [Member]          
Concentration Risk, Percentage 18.10% 17.50% 16.50% 15.80%  
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Parking Facilities, Operator, Metropolis Technologies Inc. [Member]          
Concentration Risk, Percentage     40.10%   40.20%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Parking Facilities, Operator, LAZ Parking [Member]          
Concentration Risk, Percentage     17.90%