Acquisitions - 2013 Acquisitions - Additional Information (Detail) - USD ($) $ in Thousands			12 Months Ended
	Apr. 29, 2013	Apr. 18, 2013	Dec. 31, 2014
Clara Ehf. [Member]
Business Acquisition [Line Items]
Total purchase consideration		$ 6,488
Weighted average amortization period for intangible assets acquired		4 years 3 months 18 days
Clara Ehf. [Member] | General and administrative [Member]
Business Acquisition [Line Items]
Transaction costs related to acquisition		$ 200
StreamOnce, Inc. [Member]
Business Acquisition [Line Items]
Total purchase consideration	$ 6,095
Weighted average amortization period for intangible assets acquired	4 years 8 months 12 days
Purchase price consideration paid in cash	$ 4,667
Common stock issued in connection with acquisition	532,952
Purchase consideration paid in common stock	$ 7,300
Number of restricted common stock issued	470,552
Vesting period of restricted common stock	2 years
Fair value of restricted common stock on grant date	$ 6,400
Vesting period to recognize expense	2 years
Additional consideration for employees			$ 700
Vesting period of additional consideration granted to employees	18 months
Contingent consideration	$ 600
Deferred tax liability	1,351
StreamOnce, Inc. [Member] | General and administrative [Member]
Business Acquisition [Line Items]
Transaction costs related to acquisition	$ 200