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Note 4 - Prepaid Expenses and Other Current Assets (Tables)
12 Months Ended
Dec. 31, 2023
Notes Tables  
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block]
   

December 31,

 
   

2023

   

2022

 

Prepaid dues and subscriptions

  $ 85     $ 43  

Prepaid taxes

    83       1  

Prepaid inventory

    73       211  

Prepaid insurance

    66       146  

Other

    81       159  

Total prepaid expenses and other current assets

  $ 388     $ 560