Quarterly report pursuant to Section 13 or 15(d)

STOCK-BASED COMPENSATION - Stock Option and Warrant Awards (Details)

v3.19.1
STOCK-BASED COMPENSATION - Stock Option and Warrant Awards (Details) - Stock Option Plan for Key Employees - Stock Options and Warrants - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2019
Dec. 31, 2018
Stock Options and Warrants [Roll Forward]    
Outstanding at beginning of period (in shares) 745,830  
Granted (in shares) 0  
Exercised (in shares) (85,000)  
Forfeited (in shares) (108,830)  
Outstanding at end of period (in shares) 552,000 745,830
Expected to vest (in shares) 0  
Exercisable, end of period (in shares) 552,000  
Weighted Average Exercise Price Per Share [Roll Forward]    
Outstanding at beginning of period (in dollars per share) $ 10.33  
Granted (in dollars per share) 0.00  
Exercised (in dollars per share) 7.71  
Forfeited (in dollars per share) 8.80  
Outstanding at end of period (in dollars per share) 11.04 $ 10.33
Exercisable, end of period (in dollars per share) $ 11.04  
Weighted Average Remaining Contractual Life    
Outstanding, weighted average remaining contractual life 3 years 9 months  
Exercisable, weighted average remaining contractual life 3 years 9 months  
Outstanding, Intrinsic Value   $ 0
Expected to vest, Intrinsic Value   0
Exercisable, Intrinsic Value   $ 0