Annual report pursuant to Section 13 and 15(d)

SHARE-BASED COMPENSATION (Details)

v3.19.1
SHARE-BASED COMPENSATION (Details) - USD ($)
$ / shares in Units, $ in Millions
1 Months Ended 12 Months Ended
Jan. 30, 2015
Nov. 28, 2014
Sep. 30, 2018
May 31, 2018
May 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Jun. 30, 2017
May 05, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Stock compensation expense           $ 0.6 $ 0.5    
Stock options                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Weighted average value per share of stock option grants (in USD per share)           $ 1.34 $ 1.02    
Stock options                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Number of stock options granted (in shares)           152,000      
Unrecognized compensation costs           $ 0.4      
Weighted-average period of unrecognized compensation cost expected to be recognized           1 year 10 months 24 days      
Chief Executive Officer | First anniversary | Stock options                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Vesting percentage of stock options   25.00%              
Chief Executive Officer | Monthly after first anniversary | Stock options                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Vesting percentage of stock options   0.02083%              
Chief Executive Officer | Daniel R. Lee                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Number of stock options granted (in shares)   943,834              
Chief Financial Officer | First anniversary | Stock options                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Vesting percentage of stock options 25.00%                
Chief Financial Officer | Monthly after first anniversary | Stock options                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Vesting percentage of stock options 0.02083%                
Chief Financial Officer | Lewis Fanger                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Number of stock options granted (in shares) 300,000                
Equity Incentive Plan 2015                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Shares authorized for issuance               2,500,000 1,400,000
Award terms           10 years      
Number of shares available for future issuance (in shares)           902,059      
Equity Incentive Plan 2015 | Stock options                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Number of stock options granted (in shares)     110,000            
Weighted average value per share of stock option grants (in USD per share)     $ 2.83            
Vesting period of remaining shares     3 years            
Equity Incentive Plan 2015 | Chief Executive Officer | Stock options                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Number of stock options granted (in shares)         240,000        
Weighted average value per share of stock option grants (in USD per share)         $ 2.32        
Equity Incentive Plan 2015 | Director | Stock options                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Number of stock options granted (in shares)       42,000          
Weighted average value per share of stock option grants (in USD per share)       $ 3.35          
Vesting period of remaining shares       1 year          
Issuance of share based compensation (in shares)       17,910