Annual report pursuant to Section 13 and 15(d)

Nature Of Operations And Summary Of Significant Accounting Policies (Details)

v3.7.0.1
Nature Of Operations And Summary Of Significant Accounting Policies (Details) - USD ($)
$ in Thousands
 12 Months Ended 36 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2016
Oct. 07, 2015
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]          
Income tax receivable $ 85 $ 749   $ 85  
Other long-term liabilities 76 1,812   76  
Income tax expense (benefit) 665 47,692 $ (3,818)    
Allowance for doubtful accounts 399 184   399  
Goodwill impairment   29,507      
Advertising expense 2,605 3,220 2,807    
Cooperative advertising expense 741 1,037 649    
Reserve for product warranty 892 854   892  
Warranty claims 1,051 813 879    
Research and development costs 6,598 7,469 7,335    
Available-for-sale Securities, Gross Unrealized Loss   107 59    
Available-for-sale Securities, Gross Realized Gains 241        
Available-for-sale Securities, Amortized Cost Basis $ 9,994     $ 9,994  
Available-for-sale Securities, Gross Unrealized Loss, tax   63 $ 33    
Carryback Limitations of Net Operating Losses and Tax Credits [Member]          
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]          
Income tax receivable   1,801      
Other long-term liabilities   230      
Income tax expense (benefit)   $ 1,571      
Maximum [Member]          
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]          
Sales returns as percentage of net sales       3.00%  
Building Improvements [Member]          
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]          
Estimated useful Life 20 years        
Machinery and Equipment [Member] | Minimum [Member]          
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]          
Estimated useful Life 3 years        
Machinery and Equipment [Member] | Maximum [Member]          
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]          
Estimated useful Life 10 years        
Furniture and Fixtures [Member]          
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]          
Estimated useful Life 5 years        
Sales Revenue, Goods, Net [Member] | Customer Concentration Risk [Member]          
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]          
Concentration risk, percentage 16.00% 17.00% 13.00%    
Gregory Mountain Products, Inc. [Member]          
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]          
Disposal Group, Including Discontinued Operation, Consideration     $ 84,135    
POC [Member]          
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]          
Disposal Group, Including Discontinued Operation, Consideration   $ 63,639     $ 63,639