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Leases - Maturities of Lease Liabilities (Details) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Leases [Abstract]    
Remainder of 2020 $ 1,212  
2021 2,577  
2022 1,732  
2023 1,552  
2024 1,552  
After 2024 4,398  
Total lease payments 13,023  
Less: Discount 2,361  
Present value of lease liabilities 10,662  
Current portion of operating lease obligation 1,873 $ 1,752
Non-current portion of lease liabilities $ 8,789 $ 9,773