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Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (42,611)	$ (37,949)	$ 1,856
Other comprehensive income (loss):
Net unrealized gain (loss) on investments	(424)	22	28
Total other comprehensive income (loss)	(424)	22	28
Comprehensive income (loss)	$ (43,035)	$ (37,927)	$ 1,884

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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-Section 45
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Amount after tax, before reclassification adjustments, of unrealized holding gain (loss) on available-for-sale securities.

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