v3.26.1
Note 4 - Other Recent Business Transactions or Events (Details Textual) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended
Feb. 12, 2026
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
May 19, 2025
Common Stock, Par or Stated Value Per Share (in dollars per share)   $ 0.01   $ 0.01   $ 0.01  
Professional Fees   $ 2,512 $ 3,561 $ 7,436 $ 6,353    
BRR Shares [Member]              
Investment Owned, Balance, Principal Amount   $ 3,314   $ 3,314      
Investment Owned, Closing Share Price (in dollars per share)   $ 10.21   $ 10.21      
Investment Owned, Restrictions, Bitcoin, Dollar Volume Weighted Average Price (in dollars per share)   $ 140,000   $ 140,000      
Gain (Loss) on Investments   $ (1,227)   $ (4,282)      
Investment Owned, Shares Received (in shares)       392,000      
Columbus Circle Warrants [Member]              
Gain (Loss) on Investments   (235)   $ (874)      
Investment Owned, Shares Received (in shares)       196,000      
Investment Owned, Shares Receivable, Value       $ 647      
Columbus Circle Capital Corp II [Member]              
Proceeds from Collection of Finance Receivables       485      
Notes Receivable, Maximum Additional Amount   1,500   1,500      
Financing Receivable, before Allowance for Credit Loss   $ 485   $ 485      
Columbus Circle Capital Corp II [Member]              
Professional Fees $ 3,600            
Investments Owned, Shares Purchased (in shares) 360,000            
Investments Owned, Shares Purchased, Value $ 3,600            
Private Placement Warrants [Member] | Columbus Circle Capital Corp II [Member] | Warrants of Columbus Circle II [Member]              
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)   $ 11.5   $ 11.5      
Financing Receivable, Convertible, Number of Equity Instruments (in shares)       50,000      
Private Placement [Member] | Columbus Circle Capital Corp II [Member]              
Financing Receivable, Convertible, Conversion Price (in dollars per share)   $ 10   $ 10      
Private Placement [Member] | Columbus Circle Capital Corp II [Member] | Class A Ordinary Shares of Columbus Circle II [Member]              
Financing Receivable, Convertible, Number of Equity Instruments (in shares)       150,000      
Columbus Circle Capital Corp II [Member] | Warrants [Member]              
Warrants Included in Unit, Amount (in shares) 0.33            
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares) 1            
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) $ 11.5            
Columbus Circle Capital Corp II [Member] | IPO [Member]              
Units Issued During Period, Number of Units (in shares) 23,000,000            
Units, Issued, Price Per Unit (in dollars per share) $ 10            
Proceeds from Issuance or Sale of Equity $ 230,000            
Columbus Circle Capital Corp II [Member] | IPO [Member] | Class A Ordinary Share [Member]              
Units, Number of Shares per Unit (in shares) 1            
Common Stock, Par or Stated Value Per Share (in dollars per share) $ 0.0001            
Columbus Circle Capital Corp II [Member] | Over-Allotment Option [Member]              
Units Issued During Period, Number of Units (in shares) 3,000,000            
Columbus Circle Capital Corp II [Member] | Private Placement [Member]              
Units Issued During Period, Number of Units (in shares) 265,000            
Units, Issued, Price Per Unit (in dollars per share) $ 10            
Units, Issued During Period, Value of Units $ 2,650            
Columbus Circle 2 Sponsor Corp LLC [Member] | Columbus Circle SPAC II [Member]              
Indemnification, Share Price (in dollars per share) $ 10            
Columbus Circle 2 Sponsor Corp LLC [Member] | Founder Shares [Member] | Columbus Circle SPAC II [Member]              
Investment Owned, Balance, Shares (in shares)   7,666,667   7,666,667      
Operating LLC [Member] | Founder Shares [Member] | Columbus Circle SPAC II [Member]              
Investment Owned, Balance, Shares (in shares)   667,000   667,000      
Cohen & Company Capital Markets (CCM) [Member] | Founder Shares [Member] | Columbus Circle SPAC II [Member]              
Investment Owned, Balance, Shares (in shares)   360,000   360,000      
Columbus Circle Capital Corp I [Member] | IPO [Member]              
Units Issued During Period, Number of Units (in shares)             25,000,000
Columbus Circle Capital Corp I [Member] | Over-Allotment Option [Member]              
Units Issued During Period, Number of Units (in shares)             3,000,000
Columbus Circle SPAC [Member] | Founder Shares [Member]              
Investment Owned, Balance, Shares (in shares)   2,151,666   2,151,666