Quarterly report pursuant to Section 13 or 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
3 Months Ended
Mar. 31, 2019
USD ($)
item
$ / shares
shares
Mar. 31, 2018
USD ($)
item
shares
Selling, general and administrative expenses    
Weighted Average Grant Date Fair Value    
Share-based compensation cost | $ $ 0.2 $ 0.3
Restricted stock    
Shares    
Nonvested shares at the beginning of the period | shares 96,744  
Granted (in shares) | shares 20,405 60,500
Vested (in shares) | shares (9,789)  
Forfeited (in shares) | shares (1,625)  
Nonvested shares at the end of the period | shares 105,735  
Number of equal quarterly installments for vesting of awards | item 16  
Weighted Average Grant Date Fair Value    
Nonvested shares at the beginning of period (in dollars per share) | $ / shares $ 15.67  
Granted (in dollars per share) | $ / shares 12.40  
Vested (in dollars per share) | $ / shares 15.58  
Forfeited (in dollars per share) | $ / shares 12.85  
Nonvested shares at the end of period (in dollars per share) | $ / shares $ 15.09  
Unrecognized compensation cost (in dollars) | $ $ 1.5  
Weighted average period for recognition of unrecognized compensation cost 2 years 10 months 24 days  
Restricted stock | Minimum    
Shares    
Number of equal quarterly installments for vesting of awards | item   16
Restricted stock | Maximum    
Shares    
Number of equal quarterly installments for vesting of awards | item   20