Annual report pursuant to Section 13 and 15(d)

Revenue Recognition - Summary of Contract Balances (Details)

v3.20.1
Revenue Recognition - Summary of Contract Balances (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2019
USD ($)
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]  
Balance at January 1, 2019 $ 4,223
Balance at December 31, 2019 291
Contractual Liability  
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]  
Balance at January 1, 2019 770
Recognition of revenue (481)
Addition of revenue 2
Balance at December 31, 2019 $ 291