Annual report pursuant to Section 13 and 15(d)

STOCK-BASED COMPENSATION (Narrative) (Details)

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STOCK-BASED COMPENSATION (Narrative) (Details)
1 Months Ended 12 Months Ended
Sep. 30, 2019
Aug. 08, 2016
shares
Feb. 28, 2017
USD ($)
$ / shares
shares
Aug. 31, 2016
shares
Jun. 30, 2016
shares
Feb. 29, 2016
shares
Dec. 31, 2016
USD ($)
$ / shares
shares
Dec. 31, 2015
USD ($)
item
$ / shares
shares
Apr. 30, 2016
shares
Sep. 30, 2015
consultant
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Granted (in shares) | shares             346,500 77,500    
Grant date fair value             $ 627,000 $ 384,000    
Number of shares vested in the period | shares             173,010 160,720    
Number of grants in the period, weighted average exercise price | $ / shares             $ 3.03 $ 8.36    
Common stock options                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Granted (in shares) | shares             346,500 77,500    
Number of quarter over which awards vest from grant date subsequent to initial vesting | item               16    
Stock compensation expense             $ 529,000 $ 451,000    
Unrecognized compensation expense related to unvested employee stock option             $ 1,000,000      
Compensation cost not yet recognized, period for recognition             2 years 7 months 6 days      
Options outstanding, aggregate intrinsic value             $ 647,000 0    
Options vested, aggregate intrinsic value             $ 146,000 $ 0    
Share price (in dollars per share) | $ / shares             $ 5.05 $ 2.65    
Common stock options | Minimum                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Share price (in dollars per share) | $ / shares             $ 1.93 $ 3.83    
Expected Volatility             60.00% 60.00%    
Risk-free interest rate             1.30% 1.44%    
Expected Life             7 years 7 years    
Common stock options | Maximum                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Share price (in dollars per share) | $ / shares             $ 5.50 $ 12.98    
Dividend Yield             0.00% 0.00%    
Expected Volatility             60.00% 60.00%    
Risk-free interest rate             2.06% 1.86%    
Expected Life             7 years 7 years    
Restricted stock units                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Granted (in dollars per share) | $ / shares             $ 3.22 $ 6.35    
Stock compensation expense             $ 1,700,000 $ 849,000    
Granted (in shares) | shares             1,383,159 343,930    
Unrecognized compensation expense related to unvested employee stock option             $ 4,200,000      
Compensation cost not yet recognized, period for recognition             2 years 8 months 12 days      
Vested (in shares) | shares             (262,201) (73,122)    
Restricted stock, shares issued net of shares for tax withholdings | shares             0 4,341    
Number of shares forfeited in period | shares             41,029 26,446    
2014 Omnibus Incentive Plan                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Number of shares of common stock approved for issuance | shares             2,700,000 1,400,000    
Number of additional shares authorized | shares         1,300,000          
2014 Omnibus Incentive Plan | Common stock options                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Term of award             10 years 10 years    
2014 Omnibus Incentive Plan | 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             $ 1.93 $ 3.83    
2014 Omnibus Incentive Plan | 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             $ 5.50 $ 12.98    
2015 Performance Plan | Performance Based Awards                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Stock compensation expense               $ 121,000    
Stock price measurement period             10 days      
Number of grants in the period, weighted average exercise price | $ / shares               $ 2.68    
2016 Performance Plan | Performance Based Awards                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Stock price measurement period             10 days      
Employees | Common stock options                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Forfeitures rate             6.00% 0.00%    
Consultants | Common stock options                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Stock compensation expense             $ 27,000 $ 60,000    
Non-executive employees | Performance Based Awards                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Bonus percentage             10.00%      
Non-executive employees | Performance Based Awards | Minimum                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Bonus percentage             6.67%      
Non-executive employees | Performance Based Awards | Maximum                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Bonus percentage             20.00%      
Non-executive employees | 2015 Performance Plan | Performance Based Awards                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Bonus percentage               10.00%    
Non-executive employees | 2015 Performance Plan | Performance Based Awards | Minimum                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Bonus percentage               6.67%    
Non-executive employees | 2015 Performance Plan | Performance Based Awards | Maximum                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Bonus percentage               13.34%    
Executive employees | Common stock options                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Accelerated vesting, number (in shares) | shares       26,876            
Option exercise period extended, number (in shares) | shares       43,438            
Plan modification, incremental compensation cost             $ 48,000      
Executive employees | Performance Based Awards                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Award vesting rights, percentage   50.00%                
Fair value of award             67,000      
Stock compensation expense             8,000      
Compensation cost not yet recognized             $ 59,000      
Granted (in shares) | shares   250,000                
Compensation cost not yet recognized, period for recognition             2 years 8 months 12 days      
Executive employees | Performance Based Awards | Minimum                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Bonus percentage             16.67%      
Executive employees | Performance Based Awards | Maximum                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Bonus percentage             50.00%      
Executive employees | Performance Based Awards | Maximum | Forecast                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Award vesting rights, percentage 50.00%                  
Executive employees | 2015 Performance Plan | Performance Based Awards | Minimum                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Bonus percentage               16.67%    
Executive employees | 2015 Performance Plan | Performance Based Awards | Maximum                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Bonus percentage               25.00%    
Common Stock | 2015 Performance Plan | Restricted stock units                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Granted (in shares) | shares           90,265        
Number of shares vested in the period | shares           45,140        
Common Stock | 2015 Performance Plan | Performance Based Awards                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Stock compensation expense             $ 44,000      
Common Stock | 2016 Performance Plan | Common stock options | Subsequent Event                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Granted (in shares) | shares     125,880              
Common Stock | 2016 Performance Plan | Restricted stock units | Subsequent Event                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Grant date fair value     $ 119,000              
Granted (in dollars per share) | $ / shares     $ 4.36              
Granted (in shares) | shares     27,390              
Common Stock | 2016 Performance Plan | Performance Based Awards                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Stock compensation expense             451,000      
Common Stock | 2016 Performance Plan | Performance Based Awards | Subsequent Event                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Grant date fair value     $ 332,000              
Aggregate grant date fair value of options granted     688,000              
Stock compensation expense     $ 688,000              
Vesting period     10 days              
Share price (in dollars per share) | $ / shares     $ 4.36              
Dividend Yield     0.00%              
Expected Volatility     60.00%              
Risk-free interest rate     2.15%              
Expected Life     7 years              
Common Stock | 2016 Performance Plan | Performance Based Awards | Accrued Salaries And Payroll Related Expenses                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Stock compensation expense             1,100,000      
Common Stock | 2016 Performance Plan | Performance Based Awards | Research and development                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Stock compensation expense             679,000      
Common Stock | 2016 Performance Plan | Performance Based Awards | General and administrative                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Stock compensation expense             460,000      
Common Stock | Employees                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Shares issued to consultants | shares                 5,549  
Common Stock | Consultants                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Stock compensation expense             $ 6,000 $ 156,000    
Shares issued to consultants | shares           3,000       33,000
Number of consultants | consultant                   2
Average share price is less than or equal to $15 | Executive employees | Performance Based Awards                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Average market share price threshold | $ / shares             $ 15      
Average market share price threshold, percent of shares awarded             0.00%      
Average share price is greater than or equal to $65 | Executive employees | Performance Based Awards                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Average market share price threshold | $ / shares             $ 65      
Average market share price threshold, percent of shares awarded             100.00%