Acquisitions - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands			1 Months Ended	3 Months Ended	6 Months Ended	12 Months Ended
	Dec. 14, 2016	Apr. 01, 2016	Dec. 31, 2016	Jun. 30, 2017	Jun. 30, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Common stock, par value			$ 0.01	$ 0.01	$ 0.01	$ 0.01
Finite lived intangible asset, useful life					13 years	13 years
Goodwill			$ 59,548	$ 60,979	$ 60,979	$ 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		1,307
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	$ 37,150
Cash consideration	37,532
Working capital adjustments	(382)
Fair value of net assets acquired	37,150
Business acquisition, transaction costs			935	376	$ 376	$ 935
Goodwill	29,501
Business acquisition, revenue			$ 119	$ 1,865	$ 3,838
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