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Recently Adopted Accounting Pronouncements - Additional Information (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2017 USD ($)
ASU 2016-09 [Member]
Significant Accounting Policies [Line Items]
Excess tax benefit from stock-based compensation awards	$ 0

X

- Definition

Significant accounting policies.

+ References

No definition available.

+ Details

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X

- Definition

Amount of cash outflow for realized tax benefit related to deductible compensation cost reported on the entity's tax return for equity instruments in excess of the compensation cost for those instruments recognized for financial reporting purposes.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 20
-Section 55
-Paragraph 24
-URI http://asc.fasb.org/extlink&oid=65896087&loc=d3e11374-113907

+ Details

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- Details

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