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Note 5 - Fair Value of Financial Instruments (Tables)
 6 Months Ended
Jun. 30, 2026
Notes Tables  
Fair Value, Assets Measured on Recurring and Nonrecurring Basis [Table Text Block]
   

June 30, 2026

  

(in thousands)

     Total       Level 1       Level 2       Level 3  

Cash

   $ 1,640     $ 1,640     $ -     $ -  

Notes receivable

     6,149       -       6,149       -  

Accounts receivable

     48,856       -       48,856       -  

Company-owned life insurance policies

     393       393       -       -  

Total cash and investments

   $ 57,038     $ 2,033     $ 55,005     $ -  
   

December 31, 2025

  

(in thousands)

     Total       Level 1       Level 2       Level 3  

Cash

   $ 3,895     $ 3,895     $ -     $ -  

Notes receivable

     6,672       -       6,672       -  

Accounts receivable

     39,281       -       39,281       -  

Company-owned life insurance policies

     248       248       -       -  

Total cash and investments

   $ 50,096     $ 4,143     $ 45,953     $ -