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Leases - Schedule of Maturities of Operating Leases (Details) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Jan. 02, 2019
Leases [Abstract]      
2020 $ 450    
2021 613    
2022 634    
2023 655    
2024 670    
Thereafter 931    
Total operating lease payments 3,953    
Less imputed interest (786)    
Present value of operating lease liabilities $ 3,167 $ 3,300 $ 3,458