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Consideration Transferred (Detail) - USD ($) $ in Thousands				12 Months Ended
	Dec. 14, 2016	Apr. 01, 2016	Jun. 02, 2014	Dec. 31, 2016	Dec. 31, 2014
Business Acquisition [Line Items]
Cash consideration					$ 21,236
Atoll GmbH
Business Acquisition [Line Items]
Cash consideration		$ 10,176
Value of common stock issued		14,138
Working capital adjustment		(74)
Estimated fair value of contingent consideration		952
Total consideration transferred		$ 25,266
TangenX Technology Corporation
Business Acquisition [Line Items]
Cash consideration	$ 37,532
Working capital adjustment	(467)
Total consideration transferred	$ 37,065
Refine Technology, LLC
Business Acquisition [Line Items]
Cash consideration			$ 21,170	$ 44,614	21,236
Value of common stock issued			4,000	14,135	4,000
Working capital adjustment			(66)		(66)
Estimated fair value of contingent consideration			1,370	$ 952	$ 1,370
Total consideration transferred			$ 26,540

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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Amount of equity interests of the acquirer, including instruments or interests issued or issuable in consideration for the business combination.

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Amount of liability recognized arising from contingent consideration in a business combination.

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The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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