Acquisitions - Summary of Allocation of Purchase Price (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Jul. 19, 2016	Apr. 07, 2016
Business Acquisition [Line Items]
Goodwill	$ 3,368
Birdstep Technology AB [Member]
Business Acquisition [Line Items]
Cash and cash equivalents			$ 73
Accounts receivable			99
Income tax receivable			103
Prepaids and other current assets			311
Equipment and improvements			30
Intangible assets			670
Goodwill			1,844
Total assets			3,130
Accounts payable			223
Accrued liabilities			421
Deferred revenue			486
Total liabilities			1,130
Total purchase price			$ 2,000
iMobileMagic - Mobile Experiences LDA [Member]
Business Acquisition [Line Items]
Cash and cash equivalents		$ 23
Short term investments		1
Accounts receivable		156
Prepaids and other current assets		8
Intangible assets		683
Goodwill		1,524
Total assets		2,395
Accounts payable		13
Accrued liabilities		64
Total liabilities		77
Total purchase price		$ 2,318