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Stockholders' Equity (Deficit) - Schedule of Nonvested Award Options (Details)	12 Months Ended
	Dec. 31, 2018 $ / shares shares
Stock Options
Beginning balance (in shares) | shares	0
Granted (in shares) | shares	3,840,724
Cancelled/forfeited (in shares) | shares	(582,923)
Ending balance (in shares) | shares	3,257,801
Weighted Average Grant Date Fair Value
Beginning balance (in dollars per share) | $ / shares	$ 0.00
Granted (in dollars per share) | $ / shares	11.68
Cancelled/forfeited (in dollars per share) | $ / shares	9.98
Ending balance (in dollars per share) | $ / shares	$ 11.99

X

- Definition

Gross number of share options (or share units) granted during the period.

+ References

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- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (d)(1)
-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

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- Definition

Number of non-vested options outstanding.

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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- Definition

Number of non-vested options forfeited.

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- Definition

Weighted average grant-date fair value of non-vested options forfeited.

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