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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 |  |  |  |  |

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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477 + Details
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- Definition Amount of intangible assets, excluding goodwill, acquired at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84161108&loc=d3e4845-128472 + Details
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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975 + Details
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