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Lease (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Jan. 01, 2019
Lessee, Lease, Description [Line Items]    
Operating lease asset $ 3,618  
Operating lease, liability $ 3,680  
ASU 2016-02    
Lessee, Lease, Description [Line Items]    
Operating lease asset   $ 3,800