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Summary of Significant Accounting Policies - Intangible Assets (Details)
3 Months Ended
Mar. 31, 2020
Minimum  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Intangible asset useful life 1 year
Maximum  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Intangible asset useful life 30 years