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Accounts Payable and Accrued Expenses (Q3)
9 Months Ended
Sep. 30, 2021
Payables and Accruals [Abstract]  
Accounts Payable and Accrued Expenses
9. Accounts Payable and Accrued Expenses
 
Accounts payable and accrued liabilities as of September 30, 2021 and December 31, 2020 consisted of the following (in thousands):
 
 
 
September 30, 2021
   
December 31, 2020
 
Accounts payable
 
$
6,362
   
$
2,244
 
Accrued employee expenses
   
6,500
     
6,586
 
Other accrued liabilities
   
11,019
     
3,821
 
 
 
$
23,881
   
$
12,651