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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