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Cash, Cash Equivalents, and Restricted Cash
12 Months Ended
Dec. 31, 2021
Cash and Cash Equivalents [Abstract]  
Cash, Cash Equivalents, and Restricted Cash
4.
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH
Cash, cash equivalents (which consists entirely of money market funds) and restricted cash as of December 31, 2021 and 2020 were as follows (in thousands):
 
    
As of December 31,
 
    
2021
    
2020
 
Cash and cash equivalents
   $ 14,183    $ 15,275
Restricted cash
     2,150      1,223
  
 
 
    
 
 
 
Total cash, cash equivalents, and restricted cash
   $ 16,333    $ 16,498