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Restructuring Charges - Additional information (Detail) $ in Thousands | 1 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2016 USD ($) Employee | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($) Employee
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  | $ 2,035 | $ 6,040
Restructuring liability |  | 1,376 | 3,028
Remaining accrual balance |  | 1,376 | $ 3,028
Twenty Sixteen Restructuring Plan |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Percentage of workforce reduction | 18.00% |  |
Number of employees eliminated | Employee | 155 |  |
Restructuring charges | $ 1,500 | 1,475 |
Restructuring liability |  | 1,500 |
Remaining accrual balance |  | 209 |
Twenty Sixteen Restructuring Plan | Cost of Sales |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  | 400 |
Twenty Sixteen Restructuring Plan | Research and development |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  | 700 |
Twenty Sixteen Restructuring Plan | Selling, General and Administrative Expenses |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  | 400 |
Twenty Fifteen Restructuring Plan |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Percentage of workforce reduction |  |  | 26.00%
Number of employees eliminated | Employee |  |  | 198
Restructuring charges |  | 560 | $ 6,040
Remaining accrual balance |  | $ 1,167 | 3,028
Twenty Fifteen Restructuring Plan | Cost of Sales |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  |  | 1,400
Twenty Fifteen Restructuring Plan | Research and development |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  |  | 1,300
Twenty Fifteen Restructuring Plan | Selling, General and Administrative Expenses |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  |  | $ 3,300

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- Definition The number of positions eliminated during the period as a percentage of total positions eliminated during the period in connection with the restructuring plan(s). + References No definition available. + Details
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- Definition Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 5.P.3) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140864-122747 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 + Details
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- Definition Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 + Details
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- Definition Carrying amount as of the balance sheet date of known and estimated obligations associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, which are expected to be paid in the next twelve months or in the normal operating cycle if longer. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, relocating employees, and costs associated with an ongoing benefit arrangement, but excludes costs associated with the retirement of a long-lived asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)(2)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 + Details
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