v3.26.1
Note 19 - Subsequent Events (Details Textual)
$ / shares in Units, $ in Thousands
 1 Months Ended 3 Months Ended 12 Months Ended
Mar. 12, 2026
shares
Feb. 20, 2026
Jan. 16, 2026
USD ($)
$ / shares
shares
Oct. 16, 2025
USD ($)
$ / shares
shares
Aug. 19, 2025
USD ($)
shares
Oct. 29, 2021
shares
Feb. 28, 2026
USD ($)
shares
Jan. 31, 2026
USD ($)
$ / shares
shares
Dec. 31, 2025
USD ($)
$ / shares
shares
Mar. 16, 2026
USD ($)
shares
Dec. 31, 2025
USD ($)
$ / shares
shares
Dec. 31, 2024
USD ($)
$ / shares
shares
Jan. 20, 2026
USD ($)
$ / shares
Oct. 15, 2025
$ / shares
Jun. 30, 2024
$ / shares
Dec. 31, 2023
$ / shares
Stockholders' Equity Note, Stock Split, Conversion Ratio                     35          
Proceeds from Warrant Exercises | $                     $ 852 $ 247        
Common Stock, Par or Stated Value Per Share | $ / shares                 $ 0.01   $ 0.01 $ 0.01        
Stock Issued In Connection with Exercise of Warrants, Value | $                     $ 852          
Proceeds from Issuance of Warrants | $                     $ 5,946 $ 0        
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares                 $ 5.82   $ 5.82          
Common Stock, Shares Authorized (in shares)                 1,500,000,000   1,500,000,000 1,500,000,000        
Forecast [Member]                                
Common Stock, Shares Authorized (in shares) 5,000,000,000                              
SKY Tokens [Member] | Forecast [Member]                                
Crypto Asset, Number of Units, Acquired                   1,100,000,000            
Crypto Asset, Fair Value | $                   $ 161,400            
Crypto Asset, Cost | $                   $ 70,700            
Crypto Asset, Number of Units                   2,100,000,000            
Series B Preferred Stock [Member]                                
Preferred Stock, Shares Outstanding (in shares)                 1,000   1,000 1,000        
Series F Preferred Stock [Member]                                
Stock Issued During Period, Shares, New Issues         1,986,568                      
Stock Redeemed or Called During Period, Shares       639,935                        
Stock Redeemed or Called During Period, Value | $       $ 175                        
Preferred Stock, Shares Outstanding (in shares)                 1,346,633   1,346,633          
Preferred Stock, Redemption Amount | $         $ 525       $ 350   $ 350          
The 2021 Private Placement Program [Member] | Series B Preferred Stock [Member]                                
Stock Issued During Period, Shares, New Issues           15,000                    
Preferred Stock, Shares Outstanding (in shares)                 131   131 131        
At the Market Offering Agreement [Member] | Forecast [Member]                                
Proceeds from Issuance or Sale of Equity | $                   $ 13,500            
Stock Issued During Period, Shares, New Issues                   1,300,000            
The December 2023 Warrants [Member]                                
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares                 $ 43.75   $ 43.75         $ 43.75
June 2024 Warrant [Member]                                
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares                 12.85   12.85       $ 12.85  
The January 2026 Warrants [Member] | Forecast [Member]                                
Stock Issued In Connection with Exercise of Warrants, Shares 167,539,227                              
October 2025 Pre-Funded Warrants [Member]                                
Stock Issued In Connection with Exercise of Warrants, Shares       1,081,082                        
Stock Issued In Connection with Exercise of Warrants, Value | $       $ 5,900                        
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares       $ 5.5         $ 0.05   $ 0.05     $ 0.05    
October 2025 Pre-Funded Warrants [Member] | Forecast [Member]                                
Stock Issued In Connection with Exercise of Warrants, Shares 1,081,082                              
Unsecured Convertible Notes [Member] | Conversion of Unsecured Convertible Notes To Common Stock [Member]                                
Debt Conversion, Converted Instrument, Shares Issued                 14,286              
Subsequent Event [Member]                                
Common Stock, Par or Stated Value Per Share | $ / shares     $ 0.01                   $ 0.01      
Proceeds from Disposal, Crypto Asset | $               $ 51,000                
Subsequent Event [Member] | USDT Tokens [Member]                                
Crypto Asset, Number of Units, Acquired     35,000,000                          
Crypto Asset, Number of Units, Sold               35,000,000                
Subsequent Event [Member] | USDS Tokens [Member]                                
Crypto Asset, Number of Units, Acquired     16,000,000                          
Crypto Asset, Number of Units, Sold               16,000,000                
Subsequent Event [Member] | USDT and USDS Tokens [Member]                                
Crypto Asset, Fair Value | $     $ 51,000                          
Subsequent Event [Member] | SKY Tokens [Member]                                
Crypto Asset, Number of Units, Acquired     943,599,690                          
Crypto Asset, Fair Value | $     $ 61,400                          
Subsequent Event [Member] | Series B Preferred Stock [Member]                                
Preferred Stock, Convertible, Conversion Price (in dollars per share) | $ / shares               $ 43.75                
Subsequent Event [Member] | Series F Preferred Stock [Member]                                
Stock Redeemed or Called During Period, Shares             639,935                  
Stock Redeemed or Called During Period, Value | $             $ 175                  
Preferred Stock, Shares Outstanding (in shares)             710,270                  
Preferred Stock, Redemption Amount | $             $ 175                  
Subsequent Event [Member] | The 2021 Private Placement Program [Member] | Conversion of Series B Preferred Stock to Common Stock [Member]                                
Conversion of Stock, Shares Issued               3,013                
Subsequent Event [Member] | January 2026 Private Placement [Member]                                
Proceeds from Issuance of Warrants | $     $ 25,000                          
Subsequent Event [Member] | At the Market Offering Agreement [Member]                                
Equity Issuable, Maximum Offering Price | $                         $ 100,000      
Comission, Percent                         2.00%      
Subsequent Event [Member] | The December 2023 Warrants [Member]                                
Stock Issued During Period, Shares, Warrants Exercised (in shares)               5,341                
Proceeds from Warrant Exercises | $               $ 234                
Subsequent Event [Member] | June 2024 Warrant [Member]                                
Stock Issued During Period, Shares, Warrants Exercised (in shares)               4,511                
Proceeds from Warrant Exercises | $               $ 58                
Subsequent Event [Member] | The January 2026 Warrants [Member]                                
Stock Issued In Connection with Exercise of Warrants, Shares     167,539,227                          
Stock Issued In Connection with Exercise of Warrants, Value | $     $ 137,400                          
Class of Warrant or Right, Purchase Price of Warrants or Rights | $ / shares     $ 0.85                          
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares     $ 0.05                          
Warrants Exercisable at Six Months, Percentage     20.00%                          
Warrants Exercisable at Ninth Months, Percentage     30.00%                          
Warrants Exercisable at Twelve Months, Percentage     50.00%                          
Subsequent Event [Member] | Unsecured Convertible Notes [Member] | Conversion of Unsecured Convertible Notes To Common Stock [Member]                                
Debt Conversion, Converted Instrument, Shares Issued               7,143                
Subsequent Event [Member] | Reverse Stock Split [Member]                                
Stockholders' Equity Note, Stock Split, Conversion Ratio   5