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Note 15 - Equity-based Compensation - Summary of Stock-based Compensation Expense Included in Results of Operations (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Stock-based compensation expense   $ 933
General and administrative $ 220  
Research and Development Expense [Member]    
Stock-based compensation expense 20 10
Selling and Marketing Expense [Member]    
Stock-based compensation expense 52 129
General and Administrative Expense [Member]    
Stock-based compensation expense   $ 794
General and administrative $ 148