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Summary of Significant Accounting Policies - Summary of Opening and Closing Balances of Receivables and Contract Assets From Contracts with Customers (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Jan. 01, 2018
Dec. 31, 2017
Accounting Policies [Abstract]        
Accounts Receivable, net $ 22,124 $ 13,614 $ 13,390 $ 12,577
Contract Assets(current) 9,544 5,253 1,424  
Contract Assets(non-current) $ 10,514 $ 7,252 $ 1,782