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Note 3 - Cash, Cash Equivalents and Restricted Cash
3 Months Ended
Mar. 31, 2021
Notes to Financial Statements  
Cash, Cash Equivalents, and Short-term Investments [Text Block]
3.
Cash, Cash Equivalents and Restricted Cash
 
Cash, cash equivalents and restricted cash consisted of the following (in thousands):
 
   
March 31, 2021
   
December 31, 2020
 
Cash
  $
3,914
    $
6,509
 
Cash equivalents (see detail in Note 4)
   
6,114
     
6,114
 
Restricted cash
   
337
     
337
 
Total cash and cash equivalents
   
10,365
     
12,960