Components and Allocation of Purchase Price (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 14, 2016	Apr. 01, 2016	Dec. 31, 2015	Dec. 31, 2014	Jun. 02, 2014
Business Acquisition [Line Items]
Goodwill	$ 59,548			$ 14,346
Atoll GmbH
Business Acquisition [Line Items]
Cash and cash equivalents			$ 1,409
Accounts receivable			697
Inventory			155
Other current assets			169
Fixed assets			114
Deferred tax assets			885
Accounts payable and other liabilities assumed			(599)
Deferred tax liabilities			(2,202)
Goodwill			17,077
Net assets acquired			25,266
Atoll GmbH | Customer relationships
Business Acquisition [Line Items]
Business combination, intangible assets			5,318
Atoll GmbH | Technology - developed
Business Acquisition [Line Items]
Business combination, intangible assets			2,175
Atoll GmbH | Non-competition agreements
Business Acquisition [Line Items]
Business combination, intangible assets			57
Atoll GmbH | Trademark/ tradename
Business Acquisition [Line Items]
Business combination, intangible assets			$ 11
TangenX Technology Corporation
Business Acquisition [Line Items]
Cash and cash equivalents		$ 1,218
Accounts receivable		459
Other receivables		111
Inventory		936
Other current assets		50
Fixed assets		215
Accounts payable and other liabilities assumed		(3,083)
Deferred tax liabilities	(4,525)	(4,525)
Goodwill		29,416
Net assets acquired		37,065
TangenX Technology Corporation | Customer relationships
Business Acquisition [Line Items]
Business combination, intangible assets		6,192
TangenX Technology Corporation | Technology - developed
Business Acquisition [Line Items]
Business combination, intangible assets		6,044
TangenX Technology Corporation | Non-competition agreements
Business Acquisition [Line Items]
Business combination, intangible assets		21
TangenX Technology Corporation | Trademark/ tradename
Business Acquisition [Line Items]
Business combination, intangible assets		$ 11
Refine Technology, LLC
Business Acquisition [Line Items]
Accounts receivable	1,267				$ 1,647	$ 1,647
Inventory						1,003
Other current assets	183				184	184
Fixed assets						85
Business combination, intangible assets	19,829				9,100
Business combination, indefinite lived intangible assets					1,600
Accounts payable and other liabilities assumed	(3,662)				$ (365)	(431)
Deferred tax liabilities	$ (5,841)
Goodwill						13,352
Net assets acquired						26,540
Refine Technology, LLC | In process research and development ("IPR&D")
Business Acquisition [Line Items]
Business combination, indefinite lived intangible assets						1,600
Refine Technology, LLC | Trademark/ tradename
Business Acquisition [Line Items]
Business combination, indefinite lived intangible assets						700
Refine Technology, LLC | Customer relationships
Business Acquisition [Line Items]
Business combination, intangible assets						6,400
Refine Technology, LLC | Technology - developed
Business Acquisition [Line Items]
Business combination, intangible assets						$ 2,000