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Commitments - Summary of Future Minimum Annual Lease Payments under Operating and Financing Leases (Details) $ in Thousands	Jun. 30, 2019 USD ($)
Financing Leases
Remaining 2019	$ 67
2020	120
2021	7
Total minimum lease payments	194
Less: amount representing interest	(13)
Present value of obligations under leases	181
Less: current portion	(127)
Financing lease liabilities, noncurrent	54
Operating Leases
Remaining 2019	109
2020	205
2021	183
2022	123
2023	100
Thereafter	447
Total minimum lease payments	1,167
Less: amount representing interest	(262)
Present value of obligations under leases	905
Less: current portion	(157)
Noncurrent operating lease liability	$ 748

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