Net Loss Per Common Share - Additional Information (Details) - 3.75% Convertible Senior Notes due 2022 - shares shares in Millions	3 Months Ended
Sep. 30, 2019	Jun. 30, 2019	Aug. 31, 2017
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Interest rate (as a percent)	3.75%	3.75%	3.75%
Common stock not included in the calculation of potentially diluted shares	14.9

Contractual interest rate for funds borrowed, under the debt agreement.

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 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant