Acquisitions - Summary of Pro Forma Results of Operation (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Business Acquisition [Line Items]
Net revenues	$ 44,996	$ 46,084	$ 44,883	$ 42,330	$ 29,468	$ 23,126	$ 24,298	$ 19,350	$ 178,293	$ 96,242	$ 74,212
Net (loss) income attributable to common shareholders									$ (13,287)	$ (4,721)
Earnings per share:
Basic	$ 0.00	$ 0.02	$ (0.17)	$ (0.04)	$ (0.09)	$ 0.00	$ 0.03	$ (0.01)	$ (0.19)	$ (0.08)
Diluted	$ 0.00	$ 0.02	$ (0.17)	$ (0.04)	$ (0.09)	$ 0.00	$ 0.02	$ (0.01)	$ (0.19)	$ (0.08)
Pro Forma [Member]
Business Acquisition [Line Items]
Net revenues									$ 183,527	$ 167,735
Net (loss) income attributable to common shareholders									$ (12,213)	$ (8,499)
Earnings per share:
Basic									$ (0.17)	$ (0.15)
Diluted									$ (0.17)	$ (0.15)
WAM Technologies, LLC [Member]
Business Acquisition [Line Items]
Net revenues									$ 5,234	$ 5,655
Net (loss) income attributable to common shareholders									$ 1,074	906
SkyWave Mobile Communications Inc. [Member]
Business Acquisition [Line Items]
Net revenues										65,838
Net (loss) income attributable to common shareholders										$ (4,684)