Net Loss per Share - Additional Information (Detail) - 0.25% Convertible Senior Notes Due 2022 as Liability Component [Member] $ / shares in Units, $ in Thousands	3 Months Ended
Mar. 31, 2020 USD ($) d $ / shares	May 01, 2020 USD ($)
Earnings Per Share Basic [Line Items]
Common stock conversion price \| $ / shares	$ 94.77
Debt instrument, convertible, threshold trading days \| d	20
Debt instrument, convertible, threshold consecutive trading days \| d	30
Percentage of closing price to trigger debt conversion	130.00%
Debt instrument convertible, principal amount \| $	$ 2
Subsequent Event [Member]
Earnings Per Share Basic [Line Items]
Debt instrument convertible, principal amount \| $		$ 2

The carrying amount of the equity component of convertible debt which may be settled in cash upon conversion.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870

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- Definition

The price per share of the conversion feature embedded in the debt instrument.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 5
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6031898-161870

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- Definition

Threshold period of specified consecutive trading days within which common stock price to conversion price of convertible debt instrument must exceed threshold percentage for specified number of trading days to trigger conversion feature.

+ References

No definition available.

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- Definition

Minimum percentage of common stock price to conversion price of convertible debt instruments to determine eligibility of conversion.

+ References

No definition available.

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- Definition

Threshold number of specified trading days that common stock price to conversion price of convertible debt instruments must exceed threshold percentage within a specified consecutive trading period to trigger conversion feature.

+ References

No definition available.

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- Definition

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.

+ References

No definition available.

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