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Accounts Payable and Accrued Expenses (Q3) (Tables)
9 Months Ended
Sep. 30, 2021
Payables and Accruals [Abstract]  
Schedule of 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