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Restatement of Previously Issued Condensed Consolidated Financial Statements - Impact on Condensed Consolidated Statement of Comprehensive Loss (Unaudited) (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Net loss	$ (8,003)	$ (5,828)	[1]
Unrealized gains on marketable securities, net of tax	34	44	[1]
Comprehensive loss	$ (7,969)	(5,784)	[1]
As Previously Reported [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Net loss		(5,802)
Unrealized gains on marketable securities, net of tax		44
Comprehensive loss		(5,758)
Restatement Adjustments [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Net loss		(26)
Unrealized gains on marketable securities, net of tax		0
Comprehensive loss		$ (26)
[1] See Note 2. Restatement of Previously Issued Condensed Consolidated Financial Statements

X

- Definition

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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