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Acquisition of Rivierawaves - Additional Information (Detail) - RivieraWaves - USD ($) $ in Thousands |  | 12 Months Ended
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Jul. 04, 2014 | Dec. 31, 2016
Business Acquisition [Line Items] |  |
Percentage of voting interests acquired | 100.00% |
Cost of acquired entity, purchase price | $ 18,378 |
Cost of acquired entity cash paid at closing | 14,678 |
Business acquisition, description of contingent consideration arrangements |  | The remaining amount of $3,700 payable upon the satisfaction of certain milestones (the "Contingent Consideration")
Business acquisition, contingent consideration liability | 3,700 |
Business acquisition, acquisition-related costs | 310 |
Business acquisition, description of acquired entity |  | In addition, as part of the acquisition, the Company established an employee retention plan for the RivieraWaves employees at a cost of approximately $3,400, to be payable on a semiannual basis for a period of two years after the Closing Date.
Employee retention plan cost | $ 3,400 |
Employee retention plan payment period | 2 years |

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- Definition Business combination employee retention payments period of service. + References No definition available. + Details
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- Definition With respect to a business combination completed during the period, this element provides a description of the business, other than the name, which may include the industry, size, products and other important information. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=65885119&loc=d3e1392-128463 + Details
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- Definition Percentage of voting equity interests acquired at the acquisition date in the business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=65885119&loc=d3e1392-128463 + Details
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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=73531572&loc=d3e1043-128460 + Details
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- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3213-108585 + Details
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