Annual report pursuant to Section 13 and 15(d)

STOCK-BASED COMPENSATION (Details)

v3.19.1
STOCK-BASED COMPENSATION (Details)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Apr. 11, 2018
shares
Jun. 30, 2017
$ / shares
shares
Dec. 31, 2018
USD ($)
plan
director
$ / shares
shares
Dec. 31, 2017
USD ($)
$ / shares
shares
Dec. 31, 2016
USD ($)
May 31, 2015
shares
Stock-based compensation            
Number of equity incentive plans | plan     2      
Related excess tax benefit | $     $ 0 $ 0    
Number of board members who resigned | director     6      
Restricted Stock            
Stock-based compensation            
Unrecognized compensation expense related to unvested restricted stock award | $     $ 1,700      
Weighted average recognized period     2 years 2 months 12 days      
Fair value of share vested | $     $ 1,700 $ 2,200    
Weighted average grant date fair value | $ / shares     $ 2.07 $ 4.37    
Restricted Stock | Service vesting            
Stock-based compensation            
Granted (in shares)     757,123      
Vested (in shares)     411,567      
Weighted average grant date fair value | $ / shares     $ 2.65 $ 6.89    
Vesting period     3 years      
Restricted Stock | Modified service vesting            
Stock-based compensation            
Granted (in shares)   372,182 210,668      
Vested (in shares)     210,668 120,655    
Weighted average grant date fair value | $ / shares   $ 4.40        
Cumulative effect of compensation expense reversal | $     $ (300)      
Restricted Stock | Market-based vesting            
Stock-based compensation            
Granted (in shares)     478,508      
Vested (in shares)     322,751      
Weighted average grant date fair value | $ / shares     $ 1.72 $ 3.34    
Restricted Stock | Performance Vesting            
Stock-based compensation            
Granted (in shares)     0 0    
Liabilities-Classified Awards | Service vesting | Other long-term liabilities            
Stock-based compensation            
Liability | $       $ 700    
2011 Plan | Restricted Stock | Performance Vesting            
Stock-based compensation            
Weighted average grant date fair value | $ / shares       $ 13.20    
2015 Plan | Restricted Stock            
Stock-based compensation            
Stock based award, number of shares authorized for issuance           1,000,000
2015 Plan | Restricted Stock | Market-based vesting            
Stock-based compensation            
Term       3 years    
2015 Plan | Liabilities-Classified Awards | Service vesting            
Stock-based compensation            
Granted (in shares)       295,376    
Weighted average grant date fair value | $ / shares       $ 4.30    
Initial value | $     $ 0 $ 900 $ 1,700  
Vesting period       2 years    
2015 Plan | Liabilities-Classified Awards | Service vesting | Other long-term liabilities            
Stock-based compensation            
Liability | $     $ 200      
2015 Plan | Liabilities-Classified Awards | Modified service vesting            
Stock-based compensation            
Granted (in shares)   304,329        
2015 Plan | Liabilities-Classified Awards | Market-based vesting            
Stock-based compensation            
Granted (in shares)       332,469    
Weighted average grant date fair value | $ / shares       $ 4.67    
2015 Plan | Liabilities-Classified Awards | Market-based vesting | Other long-term liabilities            
Stock-based compensation            
Liability | $       $ 200    
Outside of 2015 Plan | Restricted Stock            
Stock-based compensation            
Granted (in shares)     967,029 73,600    
Outside of 2015 Plan | Restricted Stock | Service vesting            
Stock-based compensation            
Granted (in shares)     488,521      
Vesting period     3 years      
Outside of 2015 Plan | Restricted Stock | Modified service vesting            
Stock-based compensation            
Granted (in shares)     478,508 67,853    
Vesting period     3 years      
Common stock price goals | $ / shares     $ 5.00      
Threshold consecutive trading days     30 days      
Outside of 2015 Plan | Restricted Stock | Market-based vesting            
Stock-based compensation            
Granted (in shares)       27,000    
Vesting period       2 years    
Share price goal | $ / shares       $ 6.00    
Threshold consecutive trading days       30 days    
General and administrative expenses            
Stock-based compensation            
Share-based compensation expense | $     $ 1,200 $ 2,600    
Director | 2011 Plan | Restricted Stock            
Stock-based compensation            
Vested (in shares) 4,545          
Director | 2015 Plan | Restricted Stock            
Stock-based compensation            
Granted (in shares)     238,602      
Number of directors | director     4      
Vesting period     4 years