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Other Accrued Liabilities
 9 Months Ended
Sep. 30, 2020
Other Accrued Liabilities Current [Abstract]  
Other Accrued Liabilities
3. Other Accrued Liabilities
Other accrued liabilities consist of (in thousands):
 
    
September 30,
2020
     
December 31,
2019
  
Accrued compensation
    $ 2,392      $ 2,013  
Accrued professional fees and other
      839        302  
Operating lease liability
      462        407  
  
 
 
     
 
 
  
Total other accrued liabilities
    $ 3,693      $ 2,722