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STOCK OPTIONS (Details) - USD ($)
1 Months Ended 3 Months Ended 12 Months Ended 22 Months Ended
Jan. 01, 2017
Jan. 31, 2017
Mar. 31, 2017
Mar. 31, 2016
Dec. 31, 2016
Mar. 31, 2017
Apr. 30, 2015
Mar. 31, 2015
Stock options                
Stock-based compensation (in dollars)     $ 1,300,000 $ 1,200,000        
Stock Options                
Stock options                
Granted (in shares)     1,114,463          
Expected term     10 years          
Options to purchase common stock outstanding (in shares)     4,031,756   3,193,785 4,031,756    
Stock option modification (in dollars)     $ 24,000          
Vesting period     48 months          
2007 Plan                
Stock options                
Options to purchase common stock outstanding (in shares)     77,460   150,207 77,460    
2007 Plan | Stock Options                
Stock options                
Expected term     10 years          
2010 Plan                
Stock options                
Shares available for future grants     322,355     322,355    
Granted (in shares)           0    
Options to purchase common stock outstanding (in shares)     1,721,246   1,821,487 1,721,246    
2010 Plan | Stock options                
Stock options                
Expected term     10 years          
2015 Plan                
Stock options                
Shares authorized for issuance     4,322,355     4,322,355 4,000,000  
Options to purchase common stock outstanding (in shares)     2,233,050   1,222,085 2,233,050    
2015 Plan | Stock options                
Stock options                
Expected term     10 years          
Employee Stock Purchase Plan                
Stock options                
Shares authorized for issuance               187,500
Percentage of outstanding shares reserved for future issuance     1.00%          
Increase in shares of common stock reserved for issuance (in shares)     50,000          
Maximum aggregate number of shares reserved for issuance during term of employee stock purchase plan     262,785   220,771 262,785    
Offering Period     6 months          
Employee payroll deductions (in dollars)     $ 11,000          
Stock issued under ESPP (in shares)   7,986            
Stock-based compensation (in dollars)     $ 4,000   $ 11,000      
Employee Stock Purchase Plan | Maximum                
Stock options                
Maximum aggregate number of shares reserved for issuance during term of employee stock purchase plan     1,250,000     1,250,000    
Common Stock                
Stock options                
Stock issued under ESPP (in shares)     7,986   16,729      
ASU 2016-09                
Stock options                
Cumulative effect adjustment (in dollars) $ 155,000