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Leases - Supplemental Information (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Leases      
Operating lease costs $ 100 $ 100  
Balance Sheet Information related to operating leases      
Operating lease ROU assets 686   $ 758
Operating lease liabilities, current portion 297   291
Operating lease liabilities, long-term portion 402   $ 477
Total operating lease liabilities 699    
Cash Flow Information related to operating leases      
Cash paid for amounts included in the measurement of operating leases liabilities $ 79