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Leases - Schedule of Financing Lease Right-of-use Assets and Liabilities (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2019
USD ($)
Leases [Abstract]  
Initial measurement at January 1, 2019 $ 80
Less depreciation of financing lease right-of-use assets (16)
Financing lease right-of-use assets at March 31, 2019 64
Initial measurement at January 1, 2019 86
Less principal payments on financing lease liabilities (18)
Financing lease liabilities as of March 31, 2019 68
Less non-current portion (36)
Current portion at March 31, 2019 $ 32