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Leases - (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Jan. 31, 2019
Lessee, Lease, Description [Line Items]        
Operating lease right-of-use asset $ 514 $ 2,509    
Total operating lease liabilities 526      
Operating lease expense $ 2,100 $ 1,900 $ 1,500  
Accounting Standards Update 2016-02        
Lessee, Lease, Description [Line Items]        
Operating lease right-of-use asset       $ 800
Total operating lease liabilities       $ 800