v3.26.1
Note 4 - Investments (Tables)
6 Months Ended
Jun. 30, 2026
Notes Tables  
Marketable Securities [Table Text Block]
  

June 30, 2026

          

Cumulative

          

Unrealized

  

Fair Value

 

Basis

 

Gain

Equity securities

 $41  $34  $7 

Total

 $41  $34  $7 
  

December 31, 2025

          

Cumulative

          

Unrealized

  

Fair Value

 

Basis

 

Gain

Equity securities

 $36  $34  $2 

Total

 $36  $34  $2 
Securities Owned and Other Investments Not Readily Marketable Disclosure [Table Text Block]
  

June 30, 2026

 

December 31, 2025

  

Fair Value

 

% of Total

 

Fair Value

 

% of Total

Convertible promissory note

 $1,968   100% $   0%

Total

 $1,968   100% $   0%
Investment Income [Table Text Block]
  

Three Months Ended June 30,

 

Six Months Ended June 30,

  

2026

 

2025

 

2026

 

2025

Interest on cash and cash equivalents

 $405  $428  $794  $845 

Interest on convertible promissory note

  7      7    

Net investment income

 $412  $428  $801  $845 
Gain (Loss) on Securities [Table Text Block]
  

Three Months Ended June 30,

 

Six Months Ended June 30,

  

2026

 

2025

 

2026

 

2025

Marketable securities

 $(9) $5  $5  $8 

Net (losses) gains

 $(9) $5  $5  $8