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Commitments and Contingencies - Lease Cost (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2019
USD ($)
Commitments and Contingencies Disclosure [Abstract]  
Minimum operating lease payments $ 672
Variable operating lease payments 122
Short-term operating lease payments 313
ROU amortization of finance leases 133
Interest expense of finance leases 60
Total lease cost $ 1,300
Weighted-average remaining lease term of operating leases 4 years 8 months 12 days
Weighted-average remaining lease term of finance leases 2 years 9 months 18 days
Weighted-average discount rate of operating leases 4.44%
Weighted-average discount rate of finance leases 3.50%