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Related Parties - Additional Information (Details) - USD ($)
3 Months Ended
Mar. 31, 2018
Mar. 31, 2019
Dec. 31, 2018
Related Party Transaction [Line Items]      
Receivables (payables) to related parties   $ 0 $ 0
Board of Directors Chairman      
Related Party Transaction [Line Items]      
Rent reimbursements $ 100,000