Annual report pursuant to Section 13 and 15(d)

Revenue Recognition - Summary of Contract Balances (Details)

v3.20.4
Revenue Recognition - Summary of Contract Balances (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2020
USD ($)
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]  
Balance at January 1, 2020 $ 291
Balance at December 31, 2020 5
Contractual Liability  
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]  
Balance at January 1, 2020 291
Recognition of revenue (467)
Addition of revenue 181
Balance at December 31, 2020 $ 5