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Description of Business, Basis of Consolidation and Significant Accounting Policies - Additional Information (Detail) $ / shares in Units, £ in Thousands | 1 Months Ended | 12 Months Ended
--- | --- | ---
Nov. 30, 2015 USD ($) shares | Nov. 30, 2015 GBP (£) shares | Jul. 31, 2014 USD ($) shares | Jul. 31, 2014 GBP (£) shares | Feb. 28, 2014 USD ($) shares | Feb. 28, 2014 GBP (£) shares | Dec. 31, 2015 USD ($) Derivative $ / shares shares | Dec. 31, 2014 USD ($) $ / shares shares | Oct. 31, 2014 USD ($) shares | Dec. 31, 2013 USD ($) $ / shares shares
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Advertising expense |  |  |  |  |  |  | $ 3,535,000 | $ 4,322,000 |  | $ 4,011,000
Inventory reserve allowance |  |  |  |  |  |  | $ 4,020,000 | 2,995,000 |  |
Number of Interest rate swap contract outstanding | Derivative |  |  |  |  |  |  | 1 |  |  |
Losses in other comprehensive income expected to be reclassified to earnings |  |  |  |  |  |  |  | 0 |  |
Amount raised by equity investee on shares issued |  |  |  |  |  |  | $ 317,000 | 1,666,000 |  | $ 1,610,000
Gain (Loss) from dilution of equity method investment |  |  |  |  |  |  | $ (7,000) | $ 954,000 |  |
Warrants exercised amount |  |  |  |  |  |  |  |  | $ 500,000 |
Warrants exercised shares | shares |  |  |  |  |  |  |  |  | 6,155,000 |
Ownership position in equity investment |  |  |  |  |  |  | 15.11% |  |  |
Carrying value of equity investment |  |  |  |  |  |  | $ 2,536,000 |  |  |
Quoted market value of equity investment |  |  |  |  |  |  | $ 1,850,000 |  |  |
Anti-dilutive stock options excluded from computation of diluted earning per share | shares |  |  |  |  |  |  | 0 | 1,616 |  | 0
Reduction in share based compensation expense |  |  |  |  |  |  | $ 529,000 | $ 247,000 |  | $ 247,000
TyraTech Inc. |  |  |  |  |  |  |  |  |  |
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Shares issued by equity investee | shares | 105,333,333 | 105,333,333 | 50,000,000 | 50,000,000 | 37,391,763 | 37,391,763 |  |  |  |
Amount raised by equity investee on shares issued | $ 4,800,000 | £ 3,200 | $ 5,900,000 | £ 3,500 | $ 3,100,000 | £ 1,870 |  |  |  |
Building | Minimum |  |  |  |  |  |  |  |  |  |
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment Useful Life |  |  |  |  |  |  | 10 years |  |  |
Building | Maximum |  |  |  |  |  |  |  |  |  |
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment Useful Life |  |  |  |  |  |  | 30 years |  |  |
Machinery and equipment | Minimum |  |  |  |  |  |  |  |  |  |
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment Useful Life |  |  |  |  |  |  | 3 years |  |  |
Machinery and equipment | Maximum |  |  |  |  |  |  |  |  |  |
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment Useful Life |  |  |  |  |  |  | 15 years |  |  |
Office furniture, fixtures and equipment | Minimum |  |  |  |  |  |  |  |  |  |
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment Useful Life |  |  |  |  |  |  | 3 years |  |  |
Office furniture, fixtures and equipment | Maximum |  |  |  |  |  |  |  |  |  |
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment Useful Life |  |  |  |  |  |  | 10 years |  |  |
Automotive equipment | Minimum |  |  |  |  |  |  |  |  |  |
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment Useful Life |  |  |  |  |  |  | 3 years |  |  |
Automotive equipment | Maximum |  |  |  |  |  |  |  |  |  |
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment Useful Life |  |  |  |  |  |  | 6 years |  |  |
Construction in progress | Minimum |  |  |  |  |  |  |  |  |  |
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment Useful Life |  |  |  |  |  |  | 3 years |  |  |
Construction in progress | Maximum |  |  |  |  |  |  |  |  |  |
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment Useful Life |  |  |  |  |  |  | 15 years |  |  |
Restricted Stock |  |  |  |  |  |  |  |  |  |
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Forfeited percentage of stock |  |  |  |  |  |  | 6.60% |  |  |
Weighted average grant-date fair values of restricted stock grants | $ / shares |  |  |  |  |  |  | $ 12.68 | $ 14.81 |  | $ 30.91
Performance Shares |  |  |  |  |  |  |  |  |  |
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Forfeited percentage of stock |  |  |  |  |  |  | 6.90% |  |  |
Weighted average grant-date fair values of restricted stock grants | $ / shares |  |  |  |  |  |  | $ 11.38 | 14.51 |  |
Incentive Stock Options |  |  |  |  |  |  |  |  |  |
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Forfeited percentage of stock |  |  |  |  |  |  | 3.60% |  |  |
Weighted average grant-date fair values of options in period | $ / shares |  |  |  |  |  |  |  | $ 5.27 |  |
Option shares granted | shares |  |  |  |  |  |  | 0 |  |  | 0

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