Annual report pursuant to Section 13 and 15(d)

Acquisition (Narrative) (Details)

v3.8.0.1
Acquisition (Narrative) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Aug. 21, 2017
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Business Acquisition [Line Items]        
Goodwill   $ 17,745
Net income (loss)   6,604 $ (1,736)  
Acquisition-related Costs [Member]        
Business Acquisition [Line Items]        
Net income (loss) $ 2,170      
Fair Value Adjustment to Inventory [Member]        
Business Acquisition [Line Items]        
Net income (loss) $ 3,147      
Sierra Bullets, L.L.C [Member]        
Business Acquisition [Line Items]        
Acquired outstanding membership interests 100.00%      
Total consideration value $ 79,000      
Purchase price 79,239      
Amortizable definite lived intangible assets 15,500      
Inventories 12,299      
Property and equipment 13,292      
Gross amount of accounts receivable 2,732      
Acquired accounts receivable deemed uncollectible $ 46      
Weighted-average period before renewal of intangibles not subject to amortization 5 years 9 months 18 days      
Goodwill $ 17,745      
Sierra Bullets, L.L.C [Member] | Fair Value Adjustment to Inventory [Member]        
Business Acquisition [Line Items]        
Amortizable definite lived intangible assets   (300)    
Inventories   625    
Property and equipment   86    
Goodwill   $ (411)