Financial Assets and Liabilities - Fair Value Inputs (Details) $ in Thousands	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 66,030	$ 46,245
Weighted Average | Discounted cash flow | Estimated revenue growth
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement Input	0.096	0.187
Weighted Average | Discounted cash flow | Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement Input	0.144	0.144
Weighted Average | Market | Future enterprise value/ EBIDTA ratio
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement Input	0.00138	0.00141
Minimum | Discounted cash flow | Estimated revenue growth
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement Input	(0.090)	0.050
Minimum | Discounted cash flow | Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement Input	0.144	0.144
Minimum | Market | Future enterprise value/ EBIDTA ratio
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement Input	0.00122	0.00054
Maximum | Discounted cash flow | Estimated revenue growth
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement Input	0.390	0.330
Maximum | Discounted cash flow | Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement Input	0.144	0.144
Maximum | Market | Future enterprise value/ EBIDTA ratio
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement Input	0.00219	0.00246