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Summary of Significant Accounting Policies and Basis of Presentation - Additional Information (Detail) In Thousands, except Share data, unless otherwise specified | 12 Months Ended |  |  | 12 Months Ended | 1 Months Ended | 12 Months Ended |  |  | 12 Months Ended
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Dec. 31, 2013 USD ($) | Dec. 31, 2012 USD ($) | Dec. 31, 2011 USD ($) | Dec. 31, 2013 Stock options outstanding under the 1993,1997, 2006 and 2011 Stock Option Plans USD ($) | Dec. 31, 2012 Stock options outstanding under the 1993,1997, 2006 and 2011 Stock Option Plans USD ($) | Dec. 31, 2011 Stock options outstanding under the 1993,1997, 2006 and 2011 Stock Option Plans USD ($) | Dec. 31, 2013 Production tooling USD ($) | Dec. 31, 2012 Production tooling USD ($) | Dec. 31, 2013 Minimum | Dec. 31, 2013 Maximum | Sep. 14, 2012 Intellectual Property USD ($) | Dec. 31, 2013 Intellectual Property USD ($) | Dec. 31, 2012 Intellectual Property USD ($) | Dec. 31, 2013 Patents USD ($) | Dec. 31, 2012 Patents USD ($) | Dec. 31, 2011 Patents USD ($) | Dec. 31, 2013 Johnson Controls Inc. | Dec. 31, 2012 Johnson Controls Inc. | Dec. 31, 2013 Lear Corporation | Dec. 31, 2012 Lear Corporation | Dec. 31, 2013 Magna International Inc. | Dec. 31, 2012 Magna International Inc. | Dec. 31, 2013 W.E.T EUR (€) | Oct. 31, 2013 W.E.T EUR (€) | Dec. 31, 2012 W.E.T | Dec. 31, 2013 W.E.T Minimum
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maturity period of cash equivalents | 90 days |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of accounts receivable balance |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 27.00% | 26.00% | 24.00% | 18.00% | 7.00% | 7.00% |  |  |  |
Depreciation expense | $ 14,810 | $ 14,298 | $ 8,954 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Rights and ownership purchase of intellectual property |  |  | 37 |  |  |  |  |  |  |  | 7,000 |  |  | 7,000 |  |  |  |  |  |  |  |  |  |  |  |
Estimated useful life of intangible assets |  |  |  |  |  |  |  |  |  |  | 7 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amortization of intangibles |  |  |  |  |  |  |  |  |  |  |  | 984 | 285 | 3,340 | 2,522 | 1,152 |  |  |  |  |  |  |  |  |  |
Indefinite-lived trademark assets |  | 166 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payment terms of contracts |  |  |  |  |  |  |  |  | 30 days | 120 days |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reimbursable tooling capitalized within prepaid expenses and other current assets |  |  |  |  |  |  | 1,691 | 1,878 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share based compensation expense | 3,103 | 823 | 1,403 | 3,103 | 823 | 1,403 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related deferred tax benefit | $ 1,887 | $ 1,316 |  | $ 419 | $ 301 | $ 427 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Guaranteed compensation, gross |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | € 3.71 |  |  |
Guaranteed compensation, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | € 3.17 |  |  |
Tender offer per share amount for acquisition |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | € 44.95 |  |  |
Business acquisition potential cash payment per share |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | € 85.00 | € 90.05 |  |
Domination and Profit and Loss Transfer termination period |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5 years
Shares tendered under DPLTA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 23,722 |  |  |
Business acquisition remaining outstanding shares acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 16,147 |  |
Non-controlling interest ownership percentage by non controlling owners |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.00% |  | 24.08% |
Ownership percentage in W.E.T | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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