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Acquisitions - Sprout (Q3) (Details) - USD ($) |  | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | --- | ---
Sep. 03, 2021 | Sep. 30, 2021 | Sep. 30, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Estimated Assets Acquired: |  |  |  |  |
Goodwill |  | $ 45,658,000 | $ 45,658,000 | $ 3,961,122 | $ 3,961,122
Sprout |  |  |  |  |
Asset Acquisition [Line Items] |  |  |  |  |
Total consideration | $ 31,200,000 |  |  |  |
Consideration Transferred: |  |  |  |  |
Cash consideration | 12,000,000 |  |  |  |
Share consideration | 19,186,000 |  |  |  |
Total consideration | 31,186,000 |  |  |  |
Estimated Assets Acquired: |  |  |  |  |
Goodwill | 27,049,000 |  |  |  |
Total asset acquired | $ 31,186,000 |  |  |  |
Share consideration (in shares) | 1,244,258 |  |  |  |
Share price (in dollars per share) | $ 15.42 |  |  |  |
Transaction expenses |  | $ 800,000 | $ 800,000 |  |
Sprout | Software technology |  |  |  |  |
Estimated Assets Acquired: |  |  |  |  |
Intangibles | $ 1,976,000 |  |  |  |
Sprout | Trade name |  |  |  |  |
Estimated Assets Acquired: |  |  |  |  |
Intangibles | 399,000 |  |  |  |
Sprout | Customer relationships |  |  |  |  |
Estimated Assets Acquired: |  |  |  |  |
Intangibles | $ 1,762,000 |  |  |  |

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