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Commitments and Contingencies - Components of Lease Expense and Other Quantitative Information (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2019
USD ($)
Commitments and Contingencies Disclosure [Abstract]  
Fixed operating lease expense $ 1,080
Variable operating lease expense 110
Short-term operating lease expense 85
Total lease expense $ 1,275
Weighted-average remaining lease term (years) 5 years
Weighted-average discount rate 9.40%