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Note 5 - Prepaid Expenses and Other Current Assets (Tables)
6 Months Ended
Jun. 30, 2025
Notes Tables  
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block]
  June 30,  December 31 
  

2025

  

2024

 
  

(in thousands)

 
         

Prepaid insurance

 $2,465  $1,382 

Surety bonds, current portion

  905   - 

Prepaid easement renewal fees

  -   9 

Other prepaids

  500   668 
  $3,870  $2,059