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Note 5 - Prepaid Expenses and Other Current Assets (Tables)
12 Months Ended
Dec. 31, 2024
Notes Tables  
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block]
  

December 31,

 
  

2024

  

2023

 

Prepaid insurance

 $1,044  $1,012 

Prepaid supplier expenses

  167   132 

Other receivables

  204   159 

Natural gas derivatives at fair value, current

  207    

Deposits

  129   237 

Other

  151   137 

Total prepaid expenses and other current assets

 $1,902  $1,677