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Note 2 - Cash, Cash Equivalents and Restricted Cash (Tables)
6 Months Ended
Jun. 30, 2021
Notes Tables  
Restrictions on Cash and Cash Equivalents [Table Text Block]
  

June 30,

 

December 31,

  

2021

 

2020

Cash and cash equivalents

 $188,581 $209,575

Restricted cash

 1,776 1,672

Total cash, cash equivalents and restricted cash shown in the statements of cash flows

 $190,357 $211,247