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STOCK-BASED COMPENSATION (Narrative) (Details)
1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Sep. 30, 2019
Jan. 25, 2018
USD ($)
shares
Aug. 08, 2016
Jun. 30, 2017
quarter
shares
Jan. 31, 2017
shares
Aug. 31, 2016
shares
Jun. 30, 2016
shares
Jun. 30, 2018
USD ($)
quarter
$ / shares
shares
Jun. 30, 2017
USD ($)
quarter
shares
Jun. 30, 2018
USD ($)
quarter
$ / shares
shares
Jun. 30, 2017
USD ($)
quarter
$ / shares
shares
Dec. 31, 2017
USD ($)
Jul. 01, 2017
shares
Jan. 31, 2014
shares
Common stock options                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Granted (in shares) | shares               80,000 17,500 117,500 168,380      
Vested (in shares) | shares                   74,002 125,880      
Expected to vest (in shares) | shares       42,500         42,500   42,500      
Unrecognized compensation expense related to unvested employee stock option               $ 952,000   $ 952,000        
Options outstanding, aggregate intrinsic value               1,200,000   1,200,000        
Options vested, aggregate intrinsic value               $ 728,000   $ 728,000        
Share price (in dollars per share) | $ / shares               $ 5.64   $ 5.64        
Weighted average period                   2 years 10 months 24 days        
Granted (in dollars per share) | $ / shares                   $ 4.93        
Common stock options | Minimum                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Exercise price range, lower limit (in dollars per share) | $ / shares                     $ 4.36      
Common stock options | Maximum                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Exercise price range, upper limit (in dollars per share) | $ / shares                     $ 4.68      
Restricted stock units                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Stock compensation               $ 1,228,000 $ 715,000 $ 2,082,000 $ 1,394,000      
Unrecognized compensation expense related to unvested employee stock option               $ 7,900,000   $ 7,900,000        
Weighted average period                   2 years 6 months        
Granted (in shares) | shares                   1,171,304        
Vested (in shares) | shares                   478,816        
Granted (in dollars per share) | $ / shares                   $ 4.76        
Performance Based Awards                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Performance bonus amount, percent of estimate               10.00%            
2014 Omnibus Incentive Plan                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Number of shares of common stock approved for issuance (in shares) | shares               5,950,000   5,950,000       1,400,000
Number of additional shares authorized (in shares) | shares       3,250,000     1,300,000              
Employees and Consultants | Common stock options                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Term of award                   10 years        
Aggregate grant date fair value of options granted               $ 252,000   $ 393,000        
Employees | Common stock options                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Exercise price range, lower limit (in dollars per share) | $ / shares                   $ 4.12 $ 4.36      
Exercise price range, upper limit (in dollars per share) | $ / shares                   $ 5.96 $ 4.68      
Term of award                     10 years      
Number of quarters over which awards vest, grant date subsequent to initial vesting | quarter       16       16 16 16 16      
Aggregate grant date fair value of options granted                 $ 49,000   $ 446,000      
Stock compensation               $ 117,000 101,000 $ 222,000 $ 232,000      
Forfeitures rate                   6.00% 6.00%      
Consultants | Common stock options                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Stock compensation               6,000 2,000 $ 8,000 $ 5,000      
Employees and directors | Performance Based Awards                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Bonus percentage                   10.00%        
Non-executive employees | Performance Based Awards                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Bonus percentage                       10.00%    
Non-executive employees | Non-executive Bonus Program 2017 | Restricted stock units                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Number of shares of common stock approved for issuance (in shares) | shares                         300,000  
Granted (in shares) | shares   180,528                        
Stock compensation               78,000   $ 165,000        
Unrecognized compensation expense related to unvested employee stock option   $ 1,100,000                        
Award vesting rights, percent                       25.00%    
Accrued Bonuses                       $ 436,000    
Executives | Common stock options                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Accelerated vesting, number of shares impacted | shares         8,752                  
Option exercise period extended, number of shares impacted | shares         17,504                  
Plan modification, incremental compensation cost               0     19,000      
Executives | Restricted stock units                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Accelerated vesting, number of shares impacted | shares         8,815                  
Plan modification, incremental compensation cost               0     36,000      
Executives | Performance Based Awards                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Granted (in shares) | shares           250,000                
Award vesting rights, percent     50.00%                      
Executives | Performance Based Awards | Maximum | Forecast                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Award vesting rights, percent 50.00%                          
Executives | 2015 Performance Plan | Performance Based Awards                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Granted (in dollars per share) | $ / shares                   $ 5.06        
Common Stock | 2017 Incentive Bonus Program | Performance Based Awards                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Stock compensation               0 0          
Common Stock | Non-executive Bonus Program 2017 | Performance Based Awards                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Stock compensation               0 0          
Common Stock | 2018 Incentive Bonus Program | Performance Based Awards                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Award vesting period                       10 days    
Stock compensation                   $ 492,000 0      
Common Stock | Employees and directors | 2018 Incentive Bonus Program | Restricted stock units                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Stock compensation               603,000   200,000        
Common Stock | Employees and directors | 2018 Incentive Bonus Program | Performance Based Awards                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Stock compensation               199,000   803,000        
Common Stock | Executives                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Stock compensation                   $ 0        
Common Stock | Executives | 2015 Performance Plan | Performance Based Awards                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Award vesting period                   1 year 3 months        
Stock compensation               6,000 6,000 $ 12,000 13,000      
Compensation cost not yet recognized               29,000   29,000        
Common Stock | Executives | 2017 Incentive Bonus Program                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Stock compensation                 335,000   750,000      
Common Stock | Chief Executive Officer | 2018 Incentive Bonus Program | Performance Based Awards                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Stock compensation               13,000   28,000        
Accrued Bonuses               28,000   28,000        
Research and development expenses | Common Stock | 2017 Incentive Bonus Program | Performance Based Awards                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Stock compensation                 $ 207,000   431,000      
Research and development expenses | Common Stock | Non-executive Bonus Program 2017 | Restricted stock units                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Stock compensation               63,000   133,000        
Research and development expenses | Common Stock | 2018 Incentive Bonus Program | Performance Based Awards                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Stock compensation               111,000   501,000        
General and administrative expenses | Common Stock | 2017 Incentive Bonus Program | Performance Based Awards                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Stock compensation                   128,000 $ 319,000      
General and administrative expenses | Common Stock | Non-executive Bonus Program 2017 | Restricted stock units                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Stock compensation               15,000   32,000        
General and administrative expenses | Common Stock | 2018 Incentive Bonus Program | Performance Based Awards                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Stock compensation               $ 88,000   $ 302,000