Quarterly report pursuant to Section 13 or 15(d)

Capital Transactions - Restricted Stock Units (Details)

v3.8.0.1
Capital Transactions - Restricted Stock Units (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Dec. 31, 2017
RSUs      
Share-based compensation, additional disclosures      
Discount for lack of marketability ( as a percent) 11.90%    
Share-based compensation expense $ 0.5 $ 0.7  
Unrecognized share-based compensation expense $ 2.2   $ 1.3
Weighted-average period over which the remaining compensation expense is expected to be recognized 1 year 6 months    
Minimum statutory withholding requirement paid on behalf of employees (in shares) 40,000 38,000  
Performance-based RSUs | Maximum      
Share-based compensation, additional disclosures      
Potential compensation expense $ 4.0    
2012 Stock Incentive Plan | RSUs      
Number of Shares      
Units outstanding at the beginning of the period (in shares) 728,000    
Granted (in shares) 203,000    
Forfeited (in shares) 0    
Issued (in shares) (138,000)    
Units outstanding at the end of the period (in shares) 793,000    
Weighted Average Grant Date Fair Value      
Units outstanding at the beginning of the period (in dollars per share) $ 11.56    
Granted (in dollars per share) 11.30    
Forfeited (in dollars per share) 0.00    
Issued (in dollars per share) 12.53    
Units outstanding at the end of the period (in dollars per share) $ 11.32    
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      
Share-based compensation, additional disclosures      
Restriction period 2 years    
Number of shares subject to restriction period 95,000   96,000
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) $ 11.36    
2012 Stock Incentive Plan | Performance-based RSUs      
Share-based compensation, additional disclosures      
Weighted-average grant date fair value (in dollars per share) $ 11.20    
Net Sales and Operating Income Targets | 2012 Stock Incentive Plan | Performance-based RSUs      
Share-based compensation, additional disclosures      
Vesting period 3 years