Business Combinations - Additional Information (Detail) - USD ($)				3 Months Ended			12 Months Ended
	Dec. 21, 2015	Aug. 17, 2015	Mar. 13, 2015	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015	Dec. 31, 2015
Business Acquisition [Line Items]
Direct acquisition costs				$ 430,000		$ 611,000
M2 Dynamics [Member]
Business Acquisition [Line Items]
Acquisition date				Dec. 21, 2015
Purchase price consideration	$ 19,800,000
Initial cash consideration	16,100,000			$ 93,000
Working capital adjustment	596,000
Increase in total purchase price	3,000,000
Increase in carrying value of goodwill				93,000
Business combination, contingent earnout considerations accrual				3,300,000
Earnout consideration				6,600,000
Direct transaction costs				1,200,000
Direct acquisition costs				430,000	$ 801,000
Business combination revenue recorded				3,100,000
Non-cash expenses associated with amortization of purchased intangible assets and accretion of contingent earnout consideration				749,000
Business combination net loss recorded				$ (105,000)
Purchase price consideration	$ 19,868,000
Branchbird [Member]
Business Acquisition [Line Items]
Acquisition date				Aug. 17, 2015
Purchase price consideration		$ 4,200,000
Initial cash consideration		2,700,000
Working capital adjustment		19,000
Increase in total purchase price		1,400,000
Business combination, contingent earnout considerations accrual				$ 1,600,000
Earnout consideration		2,400,000
Direct acquisition costs							$ 340,000
Estimated earnout consideration, Fair value		1,400,000
Purchase price consideration		$ 4,183,000
Zero2Ten [Member]
Business Acquisition [Line Items]
Acquisition date				Mar. 13, 2015
Initial cash consideration			$ 4,500,000			$ 4,543,000
Working capital adjustment			457,000
Increase in total purchase price			4,400,000
Business combination, contingent earnout considerations accrual				$ 6,400,000
Earnout consideration			8,600,000
Direct acquisition costs							$ 613,000
Estimated earnout consideration, Fair value			4,400,000
Purchase price consideration			9,010,000
Gross cash consideration			$ 5,000,000