Goodwill and Other Intangible Assets - Additional Information (Detail) (USD $)	0 Months Ended	3 Months Ended	6 Months Ended
	Jan. 10, 2014	Jun. 30, 2014	Jun. 30, 2014
Goodwill And Other Intangible Assets [Line Items]
Goodwill acquired		$ 9,032,000	$ 9,032,000
Intangible asset acquired	5,700,000
Amortization expense, intangible assets		200,000	407,000
Developed Technology Rights [Member]
Goodwill And Other Intangible Assets [Line Items]
Acquired intangible assets, useful life			7 years
Bluekite Ltd [Member]
Goodwill And Other Intangible Assets [Line Items]
Goodwill acquired	$ 9,032,000