Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity and Stock Based Compensation - Nonvested (Details)

v3.19.1
Stockholders' Equity and Stock Based Compensation - Nonvested (Details)
$ / shares in Units, $ in Millions
12 Months Ended
Jan. 01, 2019
item
$ / shares
shares
Dec. 31, 2018
USD ($)
installment
$ / shares
shares
Dec. 31, 2017
USD ($)
installment
$ / shares
shares
Dec. 31, 2016
USD ($)
$ / shares
shares
Selling, general and administrative expenses        
Weighted Average Grant Date Fair Value        
Share-based compensation cost | $   $ 2.8 $ 1.5 $ 1.7
Separation expense | Chief Executive Officer        
Weighted Average Grant Date Fair Value        
Share-based compensation cost | $   $ 1.7    
Restricted stock | Forecast | Officers        
Shares        
Granted (in shares) | shares 20,405      
Number of equal quarterly installments for vesting of awards | item 16      
Weighted Average Grant Date Fair Value        
Granted (in dollars per share) | $ / shares $ 12.80      
2012 Plan | Restricted stock        
Shares        
Nonvested shares at the beginning of the period | shares 96,744 161,818 186,081  
Granted (in shares) | shares   123,000 87,076  
Vested (in shares) | shares   (180,898) (88,645)  
Forfeited (in shares) | shares   (7,176) (22,694)  
Nonvested shares at the end of the period | shares   96,744 161,818 186,081
Weighted Average Grant Date Fair Value        
Nonvested shares at the beginning of period (in dollars per share) | $ / shares $ 15.67 $ 17.26 $ 16.48  
Granted (in dollars per share) | $ / shares   14.97 18.25  
Vested (in dollars per share) | $ / shares   16.62 16.56  
Forfeited (in dollars per share) | $ / shares   15.44 10.87  
Nonvested shares at the end of period (in dollars per share) | $ / shares   $ 15.67 $ 17.26 $ 16.48
Unrecognized compensation cost (in dollars) | $   $ 1.4    
Weighted average period for recognition of unrecognized compensation cost   3 years    
2012 Plan | Restricted stock | Minimum        
Shares        
Number of equal quarterly installments for vesting of awards | installment     12  
2012 Plan | Restricted stock | Maximum        
Shares        
Number of equal quarterly installments for vesting of awards | installment   20 20