Acquisitions - Additional Information (Detail) $ / shares in Units, $ in Thousands							3 Months Ended			9 Months Ended
	Jun. 01, 2016 USD ($)	May 26, 2016 USD ($)	Oct. 06, 2015 USD ($)	Jan. 16, 2015 USD ($)	Jan. 02, 2015 USD ($)	Mar. 11, 2014 USD ($) $ / shares shares	Sep. 30, 2016 USD ($) Customer	Jun. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2016 USD ($) Customer	Sep. 30, 2015 USD ($)	Dec. 31, 2015 USD ($)	Jan. 01, 2015 USD ($)
Business Acquisition [Line Items]
Estimated Useful life (years)										9 years 10 months 24 days
Portion of contingent consideration in accrued expenses							$ 1,322			$ 1,322
Customer Lists [Member]
Business Acquisition [Line Items]
Estimated Useful life (years)										10 years 3 months 18 days
Skygistics Ltd. [Member]
Business Acquisition [Line Items]
Acquisition effective date										May 26, 2016
Arrangement Agreement date										Apr. 11, 2016
Cash consideration paid		$ 3,835
Aggregate consideration payable in cash and common stock		4,349
Business acquisition contingent consideration at fair value		514
Intangible assets							1,545			$ 1,545
Portion of contingent consideration in accrued expenses							517			517
Contingent consideration accretion recorded in Selling, general and administrative expenses							3			3
Skygistics Ltd. [Member] | Indemnification Asset [Member]
Business Acquisition [Line Items]
Amount deposited in escrow to fund any indemnification obligations							$ 757			$ 757
Amount released to sellers in escrow to fund any indemnification obligations	$ 304
Skygistics Ltd. [Member] | Telematics And Enterprise Customers [Member]
Business Acquisition [Line Items]
Number of customers | Customer							250			250
Skygistics Ltd. [Member] | Customer Lists [Member]
Business Acquisition [Line Items]
Discount rate to reflect risk characteristics of intangible assets										19.00%
Intangible assets							$ 1,545			$ 1,545
Estimated Useful life (years)										13 years
Skygistics Ltd. [Member] | Maximum [Member]
Business Acquisition [Line Items]
Contingent consideration payable		$ 954
WAM Technologies, LLC [Member]
Business Acquisition [Line Items]
Acquisition effective date										Oct. 06, 2015
Cash consideration paid			$ 8,689
Aggregate consideration payable in cash and common stock										$ 8,689
Intangible assets							4,810			4,810
Amount deposited in escrow to fund any indemnification obligations			1,100
Working capital settlement			$ 189
WAM Technologies, LLC [Member] | Indemnification Asset [Member]
Business Acquisition [Line Items]
Amount deposited in escrow to fund any indemnification obligations							1,100			$ 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
Aggregate consideration payable in cash and common stock				$ 10,850
Amount deposited in escrow to fund any indemnification obligations				1,320
Working capital settlement				$ 250
Outstanding equity percentage				100.00%
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
Arrangement Agreement date										Nov. 01, 2014
Cash consideration paid					$ 130,203
Aggregate consideration payable in cash and common stock					122,373
Amount deposited in escrow to fund any indemnification obligations													$ 10,600
Working capital settlement					$ 300
Outstanding equity percentage													100.00%
Business acquisition, settled by promissory note													$ 7,500
Euroscan Holding B.V. [Member]
Business Acquisition [Line Items]
Acquisition effective date										Mar. 11, 2014
Cash consideration paid						$ 29,163
Portion of contingent consideration in accrued expenses							805			$ 805
Contingent consideration accretion recorded in Selling, general and administrative expenses							23		$ 76	45	$ 252
Outstanding equity percentage						100.00%
Number of common stock shares issued for consideration | shares						291,230
Common stock issued, per share | $ / shares						$ 7.70
Portion of contingent consideration in other non-current liabilities												$ 1,719
Reduction in fair value of earn-outs amounts							$ 245			443
Increase in fair value of earn-outs amounts										$ 182
Euroscan Holding B.V. [Member] | Maximum [Member]
Business Acquisition [Line Items]
Contingent consideration payable						$ 6,547
MWL Management B.V. and R.Q. Management B.V [Member]
Business Acquisition [Line Items]
Total consideration paid in cash common stock upon achievement of operational milestone								$ 694