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Commitments and Contingencies - Operating and Finance Leases (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]    
Operating lease ROU assets $ 2,515  
Operating lease ROU accumulated amortization (539)  
Operating lease liabilities 2,169  
Finance lease ROU assets 1,641  
Finance lease ROU accumulated amortization (187)  
Finance lease, present value of net minimum lease payments $ 1,050  
Capital lease assets   $ 2,097
Capital lease accumulated amortization   (104)
Capital lease liabilities   $ 1,789