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Note 15 - Commitments and Contingencies (Details Textual)
12 Months Ended
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Nov. 30, 2023
USD ($)
ft²
Aug. 31, 2022
USD ($)
Jan. 31, 2022
Jun. 30, 2019
ft²
Sep. 30, 2016
USD ($)
Contractual Obligation $ 662,000            
Related Party Technology License Agreement [Member] | Syzygy Licensing LLC [Member]              
Royalty Payments, Percentage of Product Revenue             4.00%
Maximum Royalties to Be Paid Under Agreement             $ 1,000,000
Royalty Expense 199,000 $ 274,000          
Royalty Guarantees, Commitments, Amount $ 81,000            
Office Space in Miami, Florida [Member]              
Area of Real Estate Property | ft²     4,487        
Lessee, Operating Lease, Term of Contract     94 months        
Lessee, Operating Lease, Rent Abatement Term     5 months        
Lessee, Operating Lease, Monthly Liability, to be Paid     $ 40        
Lessee, Operating Lease, Yearly Rent Increase     3.00%        
Office Space in Tempe, Arizona [Member]              
Area of Real Estate Property | ft²           11,256  
Lessee, Operating Lease, Term of Contract         3 years    
Lessee, Operating Lease, Monthly Liability, to be Paid       $ 10      
Lessee, Operating Lease, Yearly Rent Increase       4.00%