Summary of Significant Accounting Policies and Basis of Presentation - Additional Information (Detail) In Thousands, except Share data, unless otherwise specified	12 Months Ended										1 Months Ended		12 Months Ended				1 Months Ended	12 Months Ended
	Dec. 31, 2012 USD ($)	Dec. 31, 2011 USD ($)	Dec. 31, 2010 USD ($)	Dec. 31, 2012 Stock options outstanding under the 1993,1997, 2006 and 2011 Stock Option Plans [Member] USD ($)	Dec. 31, 2011 Stock options outstanding under the 1993,1997, 2006 and 2011 Stock Option Plans [Member] USD ($)	Dec. 31, 2010 Stock options outstanding under the 1993,1997, 2006 and 2011 Stock Option Plans [Member] USD ($)	Dec. 31, 2012 Production Tooling [Member] USD ($)	Dec. 31, 2011 Production Tooling [Member] USD ($)	Dec. 31, 2012 W.E.T.	Dec. 31, 2011 W.E.T.	Feb. 15, 2013 Subsequent Event USD ($)	Feb. 15, 2013 Subsequent Event EUR (€)	Dec. 31, 2012 W.E.T. [Member] EUR (€)	Dec. 31, 2010 Former Subsidiary BSST Now Advanced Technology [Member]	Feb. 15, 2013 W.E.T. Bank of America credit facility Subsequent Event USD ($)	Feb. 15, 2013 W.E.T. Bank of America credit facility Subsequent Event EUR (€)	Sep. 14, 2012 Intellectual Property USD ($)	Dec. 31, 2012 Intellectual Property USD ($)	Dec. 31, 2012 Patents [Member] USD ($)	Dec. 31, 2012 Minimum [Member]	Dec. 31, 2012 Minimum [Member] W.E.T. [Member]	Dec. 31, 2012 Minimum [Member] Patents [Member]	Dec. 31, 2012 Maximum [Member]	Dec. 31, 2012 Maximum [Member] Patents [Member]	Dec. 31, 2012 Lear [Member]	Dec. 31, 2011 Lear [Member]	Dec. 31, 2012 JCI [Member]	Dec. 31, 2011 JCI [Member]	Dec. 31, 2012 Magna [Member]	Dec. 31, 2011 Magna [Member]
Accounting Policies [Line Items]
Maturity period of cash equivalents	90 days
Percentage of accounts receivable balance																									18.00%	23.00%	26.00%	23.00%	7.00%	8.00%
Depreciation Expenses	$ 14,298	$ 8,954	$ 1,148
Estimated useful life of intangible assets																	7 years					4 years		17 years
Change in operating income	1,007	1,073	774
Change in basic and diluted earnings per share	$ 0.02	$ 0.03	$ 0.02
Rights and ownership purchase of intellectual property		37	17														7,000		7,000
Amortization of intangibles																		285	2,522
Indefinite-lived trademark assets	166
Payment terms of contracts																				30 days			120 days
Reimbursable tooling capitalized within prepaid expenses and other current assets							1,878	1,140
Share based compensation expense	823	1,403	1,275	823	1,403	1,275
Related deferred tax benefit	1,316	1,021		301	427	259
Non-controlling interest ownership percentage by non controlling owners									24.08%	24.12%
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
Domination and Profit and Loss Transfer termination period																					5 years
Non-controlling interest ownership in former subsidiary held by related party														15.00%
Business Acquisition, shares acquired											442,253	442,253			300,651	300,651
Business Acquisition, percentage of shares acquired											14.00%	14.00%
Business Acquisition, shares issued for acquisition											3,300,000	3,300,000
Business Acquisition, cash paid											7,247	5,408			34,245	25,556
Business Acquisition, percentage of shares acquired															99.00%	99.00%
Business Acquisition, purchase price per share																€ 85
Business Acquisition cost of acquisition, financed by borrowings															$ 43,429