Acquisitions - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands			1 Months Ended	3 Months Ended	12 Months Ended
	Dec. 14, 2016	Apr. 01, 2016	Dec. 31, 2016	Mar. 31, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Common stock, par value			$ 0.01	$ 0.01	$ 0.01
Finite lived intangible asset, useful life				13 years	13 years
Goodwill			$ 59,548	$ 59,784	$ 59,548
Customer relationships
Business Acquisition [Line Items]
Finite lived intangible asset, useful life				11 years	11 years
Technology - developed
Business Acquisition [Line Items]
Finite lived intangible asset, useful life				17 years	17 years
Atoll GmbH
Business Acquisition [Line Items]
Stock consideration		538,700
Common stock, par value		$ 0.01
Value of common stock issued		$ 14,138
Business combination, consideration transferred		25,266
Cash consideration		10,176
Working capital adjustments		74
Earnout consideration		1,100
Estimated fair value of contingent consideration		952
Fair value of net assets acquired		25,266
Business acquisition, transaction costs		1,262
Goodwill		17,077
Atoll GmbH | Up Front Payment
Business Acquisition [Line Items]
Cash consideration		10,200
Atoll GmbH | Customer relationships
Business Acquisition [Line Items]
Fair value of acquired finite lived intangible assets		$ 5,318
Finite lived intangible asset, useful life		13 years
Atoll GmbH | Technology - developed
Business Acquisition [Line Items]
Fair value of acquired finite lived intangible assets		$ 2,175
Finite lived intangible asset, useful life		14 years
Atoll GmbH | Non-competition agreements
Business Acquisition [Line Items]
Fair value of acquired finite lived intangible assets		$ 57
Finite lived intangible asset, useful life		2 years
Atoll GmbH | Trademark
Business Acquisition [Line Items]
Fair value of acquired finite lived intangible assets		$ 11
Finite lived intangible asset, useful life		2 years
TangenX Technology Corporation
Business Acquisition [Line Items]
Business combination, consideration transferred	$ 37,065
Cash consideration	37,532
Working capital adjustments	467
Fair value of net assets acquired	37,065
Business acquisition, transaction costs	1,337
Goodwill	29,416
Business acquisition, revenue			$ 119	$ 1,973
TangenX Technology Corporation | Customer relationships
Business Acquisition [Line Items]
Fair value of acquired finite lived intangible assets	$ 6,192
Finite lived intangible asset, useful life	13 years
TangenX Technology Corporation | Technology - developed
Business Acquisition [Line Items]
Fair value of acquired finite lived intangible assets	$ 6,044
Finite lived intangible asset, useful life	20 years
TangenX Technology Corporation | Non-competition agreements
Business Acquisition [Line Items]
Fair value of acquired finite lived intangible assets	$ 21
Finite lived intangible asset, useful life	5 years
TangenX Technology Corporation | Trademark
Business Acquisition [Line Items]
Fair value of acquired finite lived intangible assets	$ 11
Finite lived intangible asset, useful life	2 years