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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Statement of Comprehensive Income [Abstract]
Net loss	$ (19,743)	$ (7,958)	$ (39,609)	$ (11,812)
Other comprehensive income (loss):
Net unrealized gain (loss) on investments	18	89	(34)	190
Total other comprehensive income (loss)	18	89	(34)	190
Comprehensive loss	$ (19,725)	$ (7,869)	$ (39,643)	$ (11,622)

X

- Definition

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

+ References

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Amount after tax, before reclassification adjustments, of unrealized holding gain (loss) on available-for-sale securities.

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