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Note 10 - Leases (Details Textual) - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Dec. 31, 2023
Operating Lease, Right-of-Use Asset $ 210   $ 92
Operating Lease, Liability 219    
Operating Lease, Payments 13 $ 37  
Operating Lease, Right-of-Use Asset, Periodic Reduction $ 36 39  
Operating Lease, Weighted Average Remaining Lease Term (Year) 2 years 9 months    
Lessee, Operating Lease, Discount Rate 8.60%    
General and Administrative Expense [Member]      
Operating Lease, Cost $ 39 $ 46  
Renewed Office Lease [Member]      
Lessee, Operating Lease, Term of Contract (Year) 2 years    
Operating Lease, Right-of-Use Asset $ 219    
Operating Lease, Liability $ 219