v3.25.1
Note 8 - Convertible Notes Payable at Fair Value (Details Textual)
€ / shares in Units, $ / shares in Units, € in Thousands, $ in Thousands
1 Months Ended 3 Months Ended 7 Months Ended 11 Months Ended
Mar. 25, 2025
EUR (€)
Feb. 12, 2025
EUR (€)
Dec. 30, 2024
EUR (€)
Dec. 07, 2022
USD ($)
$ / shares
Jan. 31, 2025
USD ($)
$ / shares
shares
Mar. 31, 2025
EUR (€)
Mar. 31, 2024
EUR (€)
Aug. 30, 2024
USD ($)
$ / shares
Nov. 30, 2023
€ / shares
Mar. 31, 2025
USD ($)
$ / shares
Dec. 31, 2024
USD ($)
Feb. 05, 2024
USD ($)
Nov. 30, 2023
$ / shares
Debt Instrument, Face Amount | $                   $ 29,656 $ 27,656    
Proceeds from Convertible Debt | €           € 1,928 € 4,000            
Conversion of Debt Into Perpetual Preferred Stock [Member]                          
Debt Instrument, Convertible, Conversion Price | $ / shares         $ 4                
Debt Conversion, Converted Instrument, Shares Issuable | shares         1,200                
Debt Conversion, Converted Instrument, Shares Issuable, Preestablished Value Per Share | $ / shares         $ 30,000                
Debt Conversion, Converted Instrument, Share Issuable Amount | $         $ 36,000                
The 2022 Debentures [Member] | Yorkville [Member]                          
Debt Instrument, Coupon Rate       4.00%                  
Debt Instrument, Convertible, Conversion Price | $ / shares       $ 1.75                 $ 0.25
Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger       96.50%         85.00%        
Debt Instrument, Convertible, Threshold Consecutive Trading Days       7         7        
Debt Instrument, Default Rate       12.00%                  
The 2022 Debentures [Member] | Yorkville [Member] | Maximum [Member]                          
Debt Instrument, Face Amount | $       $ 31,100                  
The 2022 Debentures [Member] | Yorkville [Member] | Minimum [Member]                          
Debt Instrument, Convertible, Conversion Price | (per share)                 € 0.06       $ 0.006
February 2024 Debenture (Member) | Yorkville [Member]                          
Debt Instrument, Face Amount | $                       $ 4,300  
August 2024 Debenture [Member] | Yorkville [Member]                          
Debt Instrument, Face Amount | $               $ 3,300          
Omnibus Amendment to Transaction Documents [Member]                          
Proceeds from Convertible Debt | € € 1,000 € 1,000                      
Omnibus Amendment to Transaction Documents [Member] | Yorkville [Member]                          
Proceeds from Convertible Debt | €     € 5,000                    
The 2024 Debentures [Member] | Yorkville [Member]                          
Debt Instrument, Coupon Rate               12.00%          
Debt Instrument, Convertible, Conversion Price | $ / shares               $ 18.75          
Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger               85.00%          
Debt Instrument, Convertible, Threshold Consecutive Trading Days               7          
Debt Instrument, Default Rate               18.00%          
The 2024 Debentures [Member] | Yorkville [Member] | Minimum [Member]                          
Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger               20.00%          
The 2025 Debentures [Member] | Yorkville [Member]                          
Debt Instrument, Coupon Rate                   12.00%      
Debt Instrument, Convertible, Conversion Price | $ / shares                   $ 1.75      
Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger           85.00%              
Debt Instrument, Convertible, Threshold Consecutive Trading Days           7              
Debt Instrument, Default Rate                   18.00%      
The 2025 Debentures [Member] | Yorkville [Member] | Minimum [Member]                          
Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger           20.00%