Annual report pursuant to Section 13 and 15(d)

Revenue Recognition - Deferred revenues (Details)

v3.22.1
Revenue Recognition - Deferred revenues (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Jan. 01, 2020
Revenue from Contract with Customer [Abstract]      
Deferred revenue at beginning of year $ 753 $ 425  
Deferred revenue recognized during period (33,623) (31,823)  
Additions to deferred revenue during period 33,791 32,151  
Deferred revenue at end of year 921 753  
Deferred revenue recognized 753    
Accounts receivable $ 1,372 $ 185 $ 151