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Accounts Payable and Accrued Expenses (Q3) (Tables) | 9 Months Ended
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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 |

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- Definition Tabular disclosure of the components of accrued liabilities. + References No definition available. + Details
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