Value received from shareholders in common stock-related transactions that are in excess of par value or stated value and amounts received from other stock-related transactions. Includes only common stock transactions (excludes preferred stock transactions). May be called contributed capital, capital in excess of par, capital surplus, or paid-in capital.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
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Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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The cumulative amount of the reporting entity's undistributed earnings or deficit.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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-Topic 210
-SubTopic 10
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Significant Accounting Policies - Recently Adopted Accounting Standards (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Change in Accounting Principle
Accumulated deficit balance	$ (213,376)	$ (168,583)
Additional paid-in capital	1,053,079	763,303
Total stockholders' equity	840,713	594,595	$ 714,615	$ 738,932
Deferred tax assets before valuation allowance	127,472	106,965
Valuation allowance	(100,684)	$ (106,793)
ASU 2016-09 \| Early Adoption of New Accounting Principle
Change in Accounting Principle
Accumulated deficit balance	(1,300)
Additional paid-in capital	1,300
Total stockholders' equity	0
Deferred tax assets before valuation allowance	2,400
Valuation allowance	$ 2,400