Annual report pursuant to Section 13 and 15(d)

SHARE-BASED COMPENSATION (Details)

v3.20.1
SHARE-BASED COMPENSATION (Details) - USD ($)
$ / shares in Units, $ in Millions
1 Months Ended 12 Months Ended
Jan. 30, 2015
Nov. 28, 2014
Sep. 30, 2019
May 31, 2019
May 31, 2018
May 31, 2017
Dec. 31, 2019
Dec. 31, 2018
Jun. 30, 2017
May 05, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Vesting period of remaining shares             4 years      
Stock compensation expense             $ 0.3 $ 0.6    
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)             $ 0.94 $ 1.34    
Stock options                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period             12,667      
Number of stock options granted (in shares)             436,900      
Weighted average value per share of stock option grants (in USD per share)             $ 2.06      
Unrecognized compensation cost             $ 0.5      
Weighted-average period of unrecognized compensation cost expected to be recognized             2 years 1 month 6 days      
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 | Lewis Fanger [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Number of stock options granted (in shares) 300,000                  
2015 Equity Incentive Plan                    
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)             489,635      
2015 Equity Incentive Plan | Stock options                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Number of stock options granted (in shares)     260,000              
Weighted average value per share of stock option grants (in USD per share)     $ 1.97              
Vesting period of remaining shares     3 years              
2015 Equity Incentive Plan | 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        
2015 Equity Incentive Plan | Director | Stock options                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Number of stock options granted (in shares)       51,900            
Weighted average value per share of stock option grants (in USD per share)       $ 2.23            
Vesting period of remaining shares         1 year          
Issuance of share based compensation (in shares)       21,524            
2015 Equity Incentive Plan | Chief Financial Officer | Stock options                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Number of stock options granted (in shares)       100,000            
Weighted average value per share of stock option grants (in USD per share)       $ 2.23            
Vesting period of remaining shares       3 years