Acquisitions - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands					3 Months Ended
	Oct. 06, 2015	Jan. 16, 2015	Jan. 02, 2015	Mar. 11, 2014	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015	Jan. 01, 2015
Business Acquisition [Line Items]
Portion of contingent consideration in accrued expenses					$ 612
WAM Technologies, LLC [Member]
Business Acquisition [Line Items]
Acquisition effective date					Oct. 06, 2015
Aggregate consideration payable in cash and common stock	$ 8,500
Amount deposited in escrow to fund any indemnification obligations	$ 1,100
Cash consideration paid					$ 8,500
WAM Technologies, LLC [Member] | Indemnification Asset [Member]
Business Acquisition [Line Items]
Amount deposited in escrow to fund any indemnification obligations					$ 1,100
WAM Technologies, LLC [Member] | Technology and Trademarks [Member]
Business Acquisition [Line Items]
Discount rate to reflect risk characteristics of intangible assets					26.00%
InSync Software, Inc [Member]
Business Acquisition [Line Items]
Acquisition effective date					Jan. 16, 2015
Amount deposited in escrow to fund any indemnification obligations		$ 1,320
Cash consideration paid		$ 10,850
Outstanding equity percentage		100.00%
Working capital settlement		$ 250
InSync Software, Inc [Member] | Maximum [Member]
Business Acquisition [Line Items]
Contingent consideration payable		$ 5,000
SkyWave Mobile Communications Inc. [Member]
Business Acquisition [Line Items]
Acquisition effective date					Jan. 01, 2015
Aggregate consideration payable in cash and common stock			$ 130,203
Amount deposited in escrow to fund any indemnification obligations								$ 10,600
Cash consideration paid			122,373
Outstanding equity percentage								100.00%
Working capital settlement			$ 300
Arrangement Agreement date					Nov. 01, 2014
Business acquisition, settled by promissory note								$ 7,500
Euroscan Holding B.V. [Member]
Business Acquisition [Line Items]
Acquisition effective date					Mar. 11, 2014
Aggregate consideration payable in cash and common stock				$ 29,163
Outstanding equity percentage				100.00%
Number of common stock shares issued for consideration				291,230
Common stock issued, per share				$ 7.70
Portion of contingent consideration in accrued expenses					$ 612
Portion of contingent consideration in other non-current liabilities					1,181		$ 1,719
Change in fair value of earn-outs amounts					$ 100	$ (88)
Euroscan Holding B.V. [Member] | Maximum [Member]
Business Acquisition [Line Items]
Contingent consideration payable				$ 6,547