v3.26.1
Note 9 - Common and Preferred Stock (Details Textual)
 6 Months Ended 12 Months Ended 70 Months Ended
Mar. 07, 2025
USD ($)
$ / shares
shares
Nov. 05, 2024
USD ($)
$ / shares
shares
Jul. 02, 2021
USD ($)
Jul. 01, 2021
USD ($)
$ / shares
shares
Jun. 29, 2021
$ / shares
shares
Mar. 05, 2020
shares
Jun. 30, 2025
USD ($)
Dec. 31, 2025
USD ($)
$ / shares
shares
Dec. 31, 2024
USD ($)
$ / shares
shares
Dec. 31, 2025
$ / shares
shares
Jul. 02, 2026
$ / shares
Common Stock, Shares Authorized (in shares)               100,000,000 100,000,000 100,000,000  
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares               $ 0.01 $ 0.01 $ 0.01  
Common Stock, Shares, Issued (in shares)               83,213,589 75,353,889 83,213,589  
Preferred Stock, Dividend Rate, Percentage               8.875% 8.875%    
Payments of Dividends | $               $ 5,106,000 $ 5,106,000    
Adjustments to Additional Paid-In Capital, Reclassification of Dividends Paid | $               $ 0      
Common Stock, Shares, Outstanding (in shares)               83,213,589 75,353,889 83,213,589  
Series 1 Preferred Stock [Member]                      
Convertible Preferred Stock, Shares Issued upon Conversion (in shares)           405.05          
Conversion of Stock, Shares Converted (in shares)                   9,671  
Conversion of Stock, Shares Issued (in shares)                   3,917,235  
Preferred Stock, Shares Issued, Total (in shares)               329 329 329  
Preferred Stock, Shares Authorized (in shares)               100,000 100,000 100,000  
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares               $ 0.01 $ 0.01 $ 0.01  
Preferred Stock, Shares Outstanding (in shares)               329 329 329  
Depository Shares [Member]                      
Preferred Stock, Shares Per Depository Share (in dollars per share) | $ / shares         $ 0.001            
Preferred Stock, Liquidation Preference Per Share (in dollars per share) | $ / shares       $ 25              
Preferred Stock, Liquidation Preference Per Share Per Year               2.21875   2.21875  
Dividends Payable, Amount Per Share (in dollars per share) | $ / shares               $ 0.55   $ 0.55  
Depository Shares [Member] | Forecast [Member]                      
Preferred Stock, Redemption Price Per Share (in dollars per share) | $ / shares                     $ 25
Depository Shares [Member] | Upon Change of Control [Member]                      
Preferred Stock, Redemption Price Per Share (in dollars per share) | $ / shares       $ 25              
Series A Preferred Stock [Member]                      
Preferred Stock, Shares Issued, Total (in shares)               2,300 2,300 2,300  
Preferred Stock, Dividend Rate, Percentage     8.875% 8.875% 8.875%     8.875% 8.875%    
Proceeds From Issuance of Preferred Stock, Net of Issuance Costs | $     $ 54,000,000                
Preferred Stock, Shares Authorized (in shares)       7,500       7,500 7,500 7,500  
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares       $ 0.01       $ 0.01 $ 0.01 $ 0.01  
Preferred Stock, Liquidation Preference, Value | $       $ 25,000              
Preferred Stock, Liquidation Preference Per Share Per Year       2,218.75              
Payments of Dividends | $               $ 21,873,000      
Dividends Payable, Amount Per Share (in dollars per share) | $ / shares               $ 550   $ 550  
Conversion of Stock, Shares Cap (in shares)       3,748.13              
Preferred Stock, Shares Outstanding (in shares)               2,300 2,300 2,300  
Series A Preferred Stock [Member] | Forecast [Member]                      
Preferred Stock, Redemption Price Per Share (in dollars per share) | $ / shares                     $ 25,000
Series A Preferred Stock [Member] | Upon Change of Control [Member]                      
Preferred Stock, Redemption Price Per Share (in dollars per share) | $ / shares       $ 25,000              
Series A Preferred Stock [Member] | Reclassified From Accumulated Deficit To Additional Paid-in Capital [Member]                      
Adjustments to Additional Paid-In Capital, Reclassification of Dividends Paid | $             $ 19,320,000        
Conversion of Convertible Senior Notes 2020 into Preferred Stock [Member]                      
Debt Conversion, Converted Instrument, Shares Issued (in shares)           10,000          
Direct Offering [Member]                      
Stock Issued During Period, Shares, New Issues (in shares) 5,715,000 7,000,000                  
Shares Issued, Price Per Share (in dollars per share) | $ / shares $ 3.5 $ 3.34                  
Proceeds from Issuance of Common Stock, Gross | $ $ 20,000,000 $ 23,400,000                  
Proceeds from Issuance of Common Stock, Net | $ $ 18,300,000 $ 22,100,000                  
Sale Including Overallotment Option [Member] | Depository Shares [Member]                      
Stock Issued During Period, Shares, New Issues (in shares)         2,000,000            
Sale Including Overallotment Option [Member] | Sale Including Overallotment Option [Member] | Maximum [Member]                      
Stock Issued During Period, Shares, New Issues (in shares)         300,000