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Leases - Supplemental Information Related to Leases (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Operating leases
Weighted average remaining lease term	3 years 4 months 24 days		3 years 4 months 24 days		3 years 1 month 6 days
Weighted average discount rate	6.80%		6.80%		7.10%
ROU assets obtained in exchange for lease obligations
Operating leases	$ 0	$ 1,262	$ 2,198	$ 1,262
Finance leases	$ 0	$ 0	$ 11	$ 0

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Weighted average discount rate for operating lease calculated at point in time.

+ References

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-Publisher FASB
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Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of increase in right-of-use asset obtained in exchange for finance lease liability.

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Amount of increase in right-of-use asset obtained in exchange for operating lease liability.

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