Business Combinations - Additional Information (Detail)				1 Months Ended			3 Months Ended				12 Months Ended
	Dec. 21, 2015 USD ($)	Aug. 17, 2015 USD ($)	Mar. 13, 2015 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Mar. 31, 2016 USD ($)	Mar. 31, 2017 USD ($) Earnout_Period	Dec. 31, 2016 USD ($)	Jun. 30, 2016 USD ($)	Mar. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Business Acquisition [Line Items]
Initial cash consideration										$ 93,000
Increase in carrying value of goodwill							$ 0
Increase in total purchase price							$ 604,000
Direct acquisition costs										430,000
M2 Dynamics [Member]
Business Acquisition [Line Items]
Acquisition date							Dec. 21, 2015
Purchase price consideration	$ 19,800,000
Initial cash consideration	16,100,000
Working capital adjustment	596,000
Initial cash consideration increased	3,000,000
Increase in carrying value of goodwill										$ 93,000
Earnout period							1 year
Earnout consideration							$ 6,600,000
Earnout period completed					12 months
Payment of contingent earnout consideration					$ 5,100,000
Direct transaction costs					430,000			$ 430,000			$ 801,000
Purchase price consideration	$ 19,771,000
M2 Dynamics [Member] | Restatement Adjustment [Member]
Business Acquisition [Line Items]
Increase in total purchase price							$ 651,000	662,000
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
Initial cash consideration increased		1,400,000
Earnout period							1 year
Earnout consideration		2,400,000
Direct acquisition costs											340,000
Number of consecutive earnout period | Earnout_Period							2
Business combination, contingent earnout considerations accrual				$ 797,000			$ 797,000
Purchase price consideration		$ 4,183,000
Branchbird [Member] | Restatement Adjustment [Member]
Business Acquisition [Line Items]
Increase in total purchase price								221,000	$ 798,000
Zero2Ten [Member]
Business Acquisition [Line Items]
Acquisition date							Mar. 13, 2015
Initial cash consideration			$ 4,500,000
Working capital adjustment			457,000
Initial cash consideration increased			4,400,000
Earnout period							1 year
Direct acquisition costs											$ 613,000
Number of consecutive earnout period | Earnout_Period							2
Purchase price consideration			9,010,000
Gross cash consideration			$ 5,000,000
Business combination, accrued contingent earnout considerations reversed				$ 47,000	$ 238,000		$ 47,000	$ 238,000	$ 130,000
Zero2Ten [Member] | First Earnout Period [Member]
Business Acquisition [Line Items]
Earnout period completed						12 months
Payment of contingent earnout consideration						$ 3,900,000
Zero2Ten [Member] | Second Earnout Period [Member]
Business Acquisition [Line Items]
Earnout period completed				12 months
Payment of contingent earnout consideration				$ 3,000,000