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Note 5 - Cash, Cash Equivalents and Restricted Cash (Tables)
6 Months Ended
Jun. 30, 2021
Notes Tables  
Schedule of Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Table Text Block]
   

June 30,

   

December 31,

 
   

2021

   

2020

 

Cash and cash equivalents

  $ 4,451     $ 4,210  

Restricted cash

    2,856       3,885  

Cash, cash equivalents and restricted cash

  $ 7,307     $ 8,095