v3.26.1
Note 9 - Stockholders' Equity and Stock Repurchase Program (Details Textual) - USD ($)
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2015
Oct. 27, 2014
Preferred Stock, Shares Issued (in shares) 883,000 883,000      
Preferred Stock, Par or Stated Value Per Share (in dollars per share) $ 0.001 $ 0.001      
Preferred Stock, Value, Issued $ 3,532,000 $ 3,532,000      
Preferred Stock, Dividend Rate, Percentage 5.00%        
Preferred Stock, Liquidation Preference Per Share (in dollars per share) $ 4        
Share Repurchase Program, Authorized, Amount         $ 5,000,000
Treasury Stock, Shares, Acquired (in shares) 0 0 0 908,000  
Shares Acquired, Average Cost Per Share (in dollars per share)       $ 2.52  
Treasury Stock, Value, Acquired, Cost Method       $ 2,300,000  
Share Repurchase Program, Remaining Authorized, Amount $ 2,700,000        
Dividends Payable, Current $ 2,901,000 $ 2,901,000      
Preferred Stock, Shares Outstanding (in shares) 883,000 883,000      
Series A Preferred Stock [Member]          
Preferred Stock, Shares Issued (in shares) 883,000 883,000      
Preferred Stock, Par or Stated Value Per Share (in dollars per share) $ 0.001 $ 0.001      
Dividends Payable, Current       $ 2,900,000  
Preferred Stock, Shares Outstanding (in shares) 883,000 883,000