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Note 3 - Prepaid Expenses and Other Current Assets (Tables)
3 Months Ended
Mar. 31, 2025
Notes Tables  
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block]
  

March 31,

  

December 31,

 
  

2025

  

2024

 

Prepaid insurance

 $670  $1,044 

Prepaid supplier expenses

  170   167 

Other receivables

  262   204 

Natural gas derivatives at fair value, current

  141   207 

Deposits

  99   129 

Other

  168   151 

Total prepaid expenses and other current assets

 $1,510  $1,902