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Note 16 - The Financing and Warrant Liabilities (Details Textual)
$ / shares in Units, $ in Thousands
12 Months Ended
Jan. 18, 2023
Jul. 02, 2021
USD ($)
shares
Feb. 18, 2021
USD ($)
$ / shares
shares
Dec. 31, 2021
USD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2020
USD ($)
Dec. 14, 2020
Warrants and Rights Outstanding       $ 2,039 $ 185 $ 1,505  
Subsequent Event [Member] | Reverse Stock Split [Member]              
Stockholders' Equity Note, Stock Split, Conversion Ratio 5            
Investor Warrants [Member]              
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares     521,200        
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares     $ 17.95        
Placement Agent Warrants [Member]              
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares     72,968        
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares     $ 22.4375        
Warrants and Rights Outstanding     $ 1,450        
Stock Issued During Period, Shares, Cashless Warrants Exercised (in shares) | shares   8,000.000          
Placement Agent Warrants [Member] | Other Nonoperating Income (Expense) [Member]              
Gain (Loss), Exercise of Cashless Warrants   $ (20)          
The Warrants [Member] | Minimum [Member]              
Class of Warrant or Right, Beneficial Ownership Percentage             4.99%
The Warrants [Member] | Maximum [Member]              
Class of Warrant or Right, Beneficial Ownership Percentage             9.99%
Private Placement [Member]              
Stock Issued During Period, Shares, New Issues (in shares) | shares     1,042,400        
Shares Issued, Price Per Share (in dollars per share) | $ / shares     $ 17.95        
Proceeds from Issuance or Sale of Equity, Total     $ 18,700 18,711      
Sale of Equity, Placement Fee, Percent     7.00%        
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs     $ 3,050        
Placement Agent Fee     1,310        
Stock Issuance Costs, Other Offering Costs     $ 290        
Private Placement [Member] | Investor Warrants [Member]              
Warrants and Rights Outstanding       $ 10,476