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Accounts Payable and Accrued Liabilities (Tables)
6 Months Ended
Jun. 30, 2021
Payables and Accruals [Abstract]  
Schedule of Accounts Payable and Accrued Liabilities

At June 30, 2021 and December 31, 2020, accounts payable and accrued liabilities consisted of the following (in thousands):

 

  

June 30,

2021

   December 31,
2020
 
   (unaudited)     
Accounts payable  $2,720   $2,611 
Accrued compensation   1,334    1,959 
Accrued liabilities   802    1,711 
PPP loan payable   -    523 
Other current liabilities   492    9 
Total  $5,348   $6,813