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Income Taxes - Additional Information (Detail) € in Thousands, $ in Thousands | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($) | Dec. 31, 2016 EUR (€) | Dec. 14, 2016 USD ($) | Sep. 30, 2015 USD ($)
Income Taxes [Line Items] |  |  |  |  |  |
Valuation allowance increase (decrease) | $ (8,535) | $ 1,216 | $ 727 |  |  |
Deferred tax liability resulting from issuance of convertible senior notes | 6,514 |  |  |  |  |
Deferred tax assets from share-based payments | 1,722 | 1,079 |  |  |  |
Impact of unrecognized tax benefits on effective tax rate |  | 1,407 |  |  |  |
Interest and penalties related to uncertain tax positions | 16 |  |  |  |  |
Earnings of foreign subsidiaries permanently reinvest outside the U.S | $ 43,679 |  |  |  |  |
Latest Tax Year |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |
Net operating loss and business tax credit carry forwards expiration date | At various dates through December 2036 |  |  |  |  |
Generated between 2008 and 2009 |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |
Payment to DOR |  | 1,012 |  |  |  |
Liability for an uncertain tax position |  |  |  |  |  | $ 926
Domestic Tax Authority |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |
Business tax credit carryforward | $ 1,745 |  |  |  |  |
State |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |
Business tax credit carryforward | 442 |  |  |  |  |
Available to Reduce Future Federal Income Taxes |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |
Deferred tax assets from share-based payments | 14,177 |  |  |  |  |
Reserves for business tax credits | 1,407 |  |  |  |  |
Available to Reduce Future Federal Income Taxes | General Business Tax Credit Carryforward |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |
Business tax credit carryforward | 2,814 |  |  |  |  |
Research and Development Credit | Generated between 2010 and 2011 |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |
Payment to DOR |  | $ 141 |  |  |  |
TangenX Technology Corporation |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |
Deferred tax liabilities | 4,525 |  |  |  | $ 4,525 |
United States |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |
Net operating loss carry forwards | 48,550 |  |  |  |  |
Germany |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |
Net operating loss carry forwards | $ 2,407 |  |  | € 2,287 |  |

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- Definition Adjustment to additional paid in capital resulting from the recognition of convertible debt instruments as two separate components - a debt component and an equity component. This bifurcation may result in a basis difference associated with the liability component that represents a temporary difference for purposes of applying accounting for income taxes. The initial recognition of deferred taxes for the tax effect of that temporary difference is as an adjustment to additional paid in capital. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 25 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=51819886&loc=SL6014347-161799 + Details
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- Definition Amount of deferred tax liability attributable to taxable temporary differences assumed at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=75116654&loc=d3e31917-109318 Reference 2: 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=73530397&loc=d3e4845-128472 + Details
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from share-based compensation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32632-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 20 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=68052875&loc=d3e28680-109314 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32621-109319 + Details
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- Definition Amount recognized for uncertainty in income taxes classified as current. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32559-109319 + Details
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- Definition Amount of increase (decrease) to previously recorded tax expense. Includes, but is not limited to, significant settlements of income tax disputes, and unusual tax positions or infrequent actions taken by the entity, including tax assessment reversal, and IRS tax settlement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=68052875&loc=d3e28446-109314 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=68052875&loc=d3e28511-109314 + Details
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- Definition The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32559-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Carryforwards -URI http://asc.fasb.org/extlink&oid=6506874 + Details
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- Definition Amount of valuation allowance pertaining to the deferred tax asset representing potential future taxable deductions from tax credit carryforwards for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32537-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Valuation Allowance -URI http://asc.fasb.org/extlink&oid=6528051 + Details
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