Annual report pursuant to Section 13 and 15(d)

STOCK-BASED COMPENSATION Activity (Details)

v3.19.1
STOCK-BASED COMPENSATION Activity (Details)
 3 Months Ended 12 Months Ended
Jun. 30, 2017
$ / shares
shares
Dec. 31, 2018
USD ($)
installment
$ / shares
shares
Dec. 31, 2017
$ / shares
shares
Fair Value Assumptions      
Number of installment in which restricted stock will vest if the stock price goal is achieved after March 31, 2019 and on or prior to March 31, 2020 | installment   3  
Number of installment in which restricted if the stock will vest stock price goal is achieved after March 31, 2020 and on or prior to March 31, 2021 | installment   2  
Reduction in stock compensation expense | $   $ (100,000)  
Date the stock price goal      
Fair Value Assumptions      
Vesting percentage if the stock price goal is achieved after March 31, 2019 and on or prior to March 31, 2020   0.33%  
Vesting percentage if the stock price goal is achieved after March 31, 2020 and on or prior to March 31, 2021   0.67%  
Vesting on March 31, 2020      
Fair Value Assumptions      
Vesting percentage if the stock price goal is achieved after March 31, 2019 and on or prior to March 31, 2020   0.33%  
Vesting on March 31, 2021      
Fair Value Assumptions      
Vesting percentage if the stock price goal is achieved after March 31, 2019 and on or prior to March 31, 2020   0.33%  
Vesting percentage if the stock price goal is achieved after March 31, 2020 and on or prior to March 31, 2021   0.33%  
Restricted Stock      
Weighted-Average Grant Date Fair Value per Share      
Unvested restricted stock at the beginning of the period (in dollars per share)   $ 4.37  
Unvested restricted stock at the end of the period (in dollars per share)   $ 2.07 $ 4.37
Restricted Stock | Service vesting      
Number of Shares      
Unvested restricted units at the beginning of the period (in shares) | shares   91,971  
Granted (in shares) | shares   757,123  
Vesting (in shares) | shares   (411,567)  
Forfeited (in shares) | shares   (13,441)  
Unvested restricted units at the end of the period (in shares) | shares   634,754 91,971
Weighted-Average Grant Date Fair Value per Share      
Unvested restricted stock at the beginning of the period (in dollars per share)   $ 6.89  
Granted (in dollars per share)   2.61  
Vested (in dollars per share)   4.37  
Forfeited (in dollars per share)   2.85  
Unvested restricted stock at the end of the period (in dollars per share)   $ 2.65 $ 6.89
Fair Value Assumptions      
Vesting period   3 years  
Restricted Stock | Modified service vesting      
Number of Shares      
Granted (in shares) | shares 372,182 210,668  
Vesting (in shares) | shares   (210,668) (120,655)
Weighted-Average Grant Date Fair Value per Share      
Granted (in dollars per share)   $ 4.30  
Unvested restricted stock at the end of the period (in dollars per share) $ 4.40    
Restricted Stock | Market-based vesting      
Number of Shares      
Unvested restricted units at the beginning of the period (in shares) | shares   404,304  
Granted (in shares) | shares   478,508  
Vesting (in shares) | shares   (322,751)  
Forfeited (in shares) | shares   (5,939)  
Unvested restricted units at the end of the period (in shares) | shares   620,457 404,304
Weighted-Average Grant Date Fair Value per Share      
Unvested restricted stock at the beginning of the period (in dollars per share)   $ 3.34  
Granted (in dollars per share)   1.21  
Vested (in dollars per share)   4.67  
Forfeited (in dollars per share)   2.91  
Unvested restricted stock at the end of the period (in dollars per share)   $ 1.72 $ 3.34
Fair Value Assumptions      
Expected term (years)   3 years 11 days  
Expected volatility   35.10%  
Expected dividend yield   0.00%  
Risk-free interest rate   2.67%  
Restricted Stock | Market-based vesting | Minimum      
Fair Value Assumptions      
Expected term (years)   3 years 11 days  
Restricted Stock | Modified Market Based Vesting      
Weighted-Average Grant Date Fair Value per Share      
Modified (in dollars per share) | $   $ 4.67  
Restricted Stock | Performance Vesting      
Number of Shares      
Granted (in shares) | shares   0 0
Restricted Stock | 2015 Plan | Modified Market Based Vesting      
Number of Shares      
Granted (in shares) | shares   66,335 11,502
Restricted Stock | 2011 Plan | Performance Vesting      
Number of Shares      
Unvested restricted units at the beginning of the period (in shares) | shares   211  
Unvested restricted units at the end of the period (in shares) | shares     211
Weighted-Average Grant Date Fair Value per Share      
Unvested restricted stock at the beginning of the period (in dollars per share)   $ 13.20  
Unvested restricted stock at the end of the period (in dollars per share)     $ 13.20
Liabilities-Classified Awards | 2015 Plan | Service vesting      
Number of Shares      
Granted (in shares) | shares     295,376
Weighted-Average Grant Date Fair Value per Share      
Unvested restricted stock at the beginning of the period (in dollars per share)   4.30  
Unvested restricted stock at the end of the period (in dollars per share)     $ 4.30
Fair Value Assumptions      
Vesting period     2 years
Liabilities-Classified Awards | 2015 Plan | Modified service vesting      
Number of Shares      
Granted (in shares) | shares 304,329    
Liabilities-Classified Awards | 2015 Plan | Market-based vesting      
Number of Shares      
Granted (in shares) | shares     332,469
Weighted-Average Grant Date Fair Value per Share      
Unvested restricted stock at the beginning of the period (in dollars per share)   $ 4.67  
Unvested restricted stock at the end of the period (in dollars per share)     $ 4.67