Acquisitions - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended
	May 26, 2016	Mar. 11, 2014	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Business Acquisition [Line Items]
Portion of contingent consideration in accrued expenses			$ 680		$ 1,174
Skygistics Ltd. [Member]
Business Acquisition [Line Items]
Acquisition effective date			May 26, 2016
Arrangement Agreement date			Apr. 11, 2016
Cash consideration paid	$ 3,835
Reduction in fair value of earn-outs amounts			$ 519
Skygistics Ltd. [Member] | Maximum [Member]
Business Acquisition [Line Items]
Contingent consideration payable	$ 954
Euroscan Holding B.V. [Member]
Business Acquisition [Line Items]
Acquisition effective date			Mar. 11, 2014
Cash consideration paid		$ 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			$ 680		$ 655
Contingent consideration accretion recorded in selling, general and administrative expenses			$ 25	$ 88
Euroscan Holding B.V. [Member] | Maximum [Member]
Business Acquisition [Line Items]
Contingent consideration payable		$ 6,547