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Business Combinations - Narrative (Details) - S2 Systems Corporation - USD ($) $ in Millions | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jan. 31, 2020 | Mar. 31, 2021 | Mar. 31, 2020 | Dec. 31, 2020
Business Acquisition [Line Items] |  |  |  |
Consideration transferred | $ 17.7 |  |  |
Cash payments to acquire businesses | 13.7 |  |  |
Cash acquired | 0.1 |  |  |
Value of shares issued | 1.8 |  |  |
Consideration held back | $ 2.2 |  |  |
Consideration holdback period | 18 months |  |  |
Payments to settle acquiree's outstanding debt | $ 6.9 |  |  |
Compensation arrangements value | $ 20.3 |  |  |
Compensation arrangement with individual, compensation expense |  | $ 1.4 | $ 7.1 |
Compensation arrangement with individual, recorded liability |  | $ 7.5 |  |
Compensation arrangement, weighted-average remaining recognition period |  | 2 years |  |
Repayments of notes payable |  |  |  | $ 0.2
Estimated useful life of acquired developed technology |  | 2 years |  |
Purchase accounting adjustment |  |  |  | $ 0.8

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