Significant Accounting Policies (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Accounting Policies [Line Items]
Total tooling related assets	$ 8,845	$ 3,881
Inventories Net Of Progress Billings And Reserves [Member]
Accounting Policies [Line Items]
Total tooling related assets	8,793	3,482
Prepaid Expenses And Other Current Assets Net [Member]
Accounting Policies [Line Items]
Total tooling related assets	$ 52	$ 399