Quarterly report pursuant to Section 13 or 15(d)

Restricted Stock Units (Details)

v3.7.0.1
Restricted Stock Units (Details) - USD ($)
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Dec. 31, 2016
RSUs      
Share-based compensation, additional disclosures      
Share-based compensation expense $ 700,000 $ 600,000  
Unrecognized share-based compensation expense $ 2,900,000   $ 2,000,000
Weighted-average period over which the remaining compensation expense is expected to be recognized 1 year 3 months 18 days    
Minimum statutory withholding requirement paid on behalf of employees (in shares) 38,000 20,000  
Performance-based RSUs      
Share-based compensation, additional disclosures      
Share-based compensation expense $ 0 $ 0  
Performance-based RSUs | Maximum      
Share-based compensation, additional disclosures      
Potential compensation expense $ 4,200,000    
2012 Stock Incentive Plan | RSUs      
Number of Shares      
Units outstanding at the beginning of the period (in shares) 838,000    
Granted (in shares) 217,000    
Forfeited (in shares) (19,000)    
Issued (in shares) (144,000)    
Units outstanding at the end of the period (in shares) 892,000    
Weighted Average Grant Date Fair Value      
Units outstanding at the beginning of the period (in dollars per share) $ 11.39    
Granted (in dollars per share) 13.59    
Forfeited (in dollars per share) 12.59    
Issued (in dollars per share) 12.46    
Units outstanding at the end of the period (in dollars per share) $ 11.82    
Share-based compensation, additional disclosures      
Vesting period upon achievement of annual nets sales growth targets (in years) 1 year    
Vesting period upon achievement of earnings-per-share target (in years) 1 year    
2012 Stock Incentive Plan | RSUs | Minimum      
Share-based compensation, additional disclosures      
Vesting period 12 months    
2012 Stock Incentive Plan | RSUs | Maximum      
Share-based compensation, additional disclosures      
Vesting period 48 months    
2012 Stock Incentive Plan | RSUs | Board of Directors      
Number of Shares      
Number of shares subject to restriction period 79,000   69,000
Share-based compensation, additional disclosures      
Restriction period 2 years    
2012 Stock Incentive Plan | Performance-based RSUs      
Share-based compensation, additional disclosures      
Weighted-average grant date fair value (in dollars per share) $ 13.35    
2012 Stock Incentive Plan | Time-based RSUs      
Share-based compensation, additional disclosures      
Vesting period 3 years    
Weighted-average grant date fair value (in dollars per share) $ 13.74    
2012 Stock Incentive Plan | Net Sales and Operating Income Targets | Performance-based RSUs      
Share-based compensation, additional disclosures      
Vesting period 3 years