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Fair Value - Contingent consideration (Details) $ in Thousands | Mar. 31, 2021 USD ($) $ / shares | Dec. 31, 2020 | Dec. 31, 2020 $ / shares | Dec. 31, 2020 USD ($) | Dec. 31, 2019
--- | --- | --- | --- | --- | ---
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Business combination contingent consideration | $ 1,596 |  |  |  |
Discount rate |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Business combination contingent consideration, measurement input | 6.7 | 9.0 |  |  |
Discount rate | Minimum |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Business combination contingent consideration, measurement input | 25.7 | 9.96 |  |  | 15.26
Discount rate | Maximum |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Business combination contingent consideration, measurement input | 31.5 | 9.98 |  |  | 16.26
Revenue volatility |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Business combination contingent consideration, measurement input |  | 18.00 |  |  | 19.00
Cost of capital | Minimum |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Business combination contingent consideration, measurement input | 25.7 |  |  |  |
Cost of capital | Maximum |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Business combination contingent consideration, measurement input | 32.5 |  |  |  |
Cost of capital | Weighted Average |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Business combination contingent consideration, measurement input |  | 21.50 |  |  | 29.50
Current stock price |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Business combination contingent consideration, measurement input | $ / shares | 17.70 |  | 14.27 |  |
Strike price |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Business combination contingent consideration, measurement input | $ / shares | 20.00 |  | 20.00 |  |
Volatility |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Business combination contingent consideration, measurement input | 80.0 | 60.0 |  |  |
Volatility | Minimum |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Business combination contingent consideration, measurement input | 38.1 |  |  |  |
Volatility | Maximum |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Business combination contingent consideration, measurement input | 68.5 |  |  |  |
Income approach |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Business combination contingent consideration |  |  |  | $ 1,800 |
Monte Carlo simulation method |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Business combination contingent consideration | $ 1,273 |  |  | $ 1,749 |
Monte Carlo simulation method | Current stock price |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Contingent Consideration Earnout, Measurement Input | 17.70 | 14.27 |  |  |
Monte Carlo simulation method | Exercise Price | Minimum |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Contingent Consideration Earnout, Measurement Input | 20 | 18 | 18 |  |
Monte Carlo simulation method | Exercise Price | Maximum |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Contingent Consideration Earnout, Measurement Input | 22 | 20 | 20 |  |
Monte Carlo simulation method | Exercise Price | Weighted Average |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Contingent Consideration Earnout, Measurement Input |  | 22 | 22 |  |
Monte Carlo simulation method | Volatility |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Contingent Consideration Earnout, Measurement Input | 75 | 60 |  |  |
Monte Carlo simulation method | Forfeiture Rate |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Contingent Consideration Earnout, Measurement Input | 16 | 16 |  |  |

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