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Subsequent Events - 2019 Employee Stock Plan (Details) - shares	Oct. 31, 2019	Sep. 30, 2019	Dec. 31, 2018
Subsequent Event [Line Items]
Shares authorized for issuance (in shares)		85,642,792	83,663,477
Subsequent Event | Employee Stock
Subsequent Event [Line Items]
Shares authorized for issuance (in shares)	1,700,000

X

- Definition

Aggregate number of common shares reserved for future issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.29)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Period Type:	instant

X

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

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Period Type:	duration

X

- Details

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Namespace Prefix:
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X

- Details

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Namespace Prefix:
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Balance Type:
Period Type: