Annual report pursuant to Section 13 and 15(d)

Stock Options and Warrants - Additional Information (Detail)

v3.7.0.1
Stock Options and Warrants - Additional Information (Detail) - USD ($)
 1 Months Ended 12 Months Ended
Jan. 31, 2017
Dec. 12, 2016
Feb. 28, 2017
Jan. 31, 2017
Sep. 30, 2016
Jun. 30, 2016
May 31, 2017
May 31, 2016
Feb. 12, 2017
Mar. 31, 2016
Feb. 28, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Proceeds from exercise of warrants             $ 397,883 $ 548,619      
Extended expiration date of warrants       May 30, 2017              
Compensation expense             $ 1,204,791 $ 2,353,194      
2017 Short Term Convertible Notes                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Warrants to purchase common shares, shares             383,333        
Term of warrants             5 years        
Exercise price of warrants, per share             $ 1.35        
Placement Agent                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Warrants to purchase common shares, shares 122,799   453,652 122,799 1,066,667   576,451        
Term of warrants 5 years   5 years   5 years   5 years        
Exercise price of warrants, per share $ 0.825   $ 0.825 $ 0.825 $ 0.825   $ 0.825        
Private Equity Offering                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Warrants to purchase common shares, shares             774,097        
Term of warrants           5 years   5 years      
Exercise price of warrants, per share           $ 1.00          
Proceeds from exercise of warrants             $ 398,000        
Private Equity Offering | Minimum                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Exercise price of warrants, per share               $ 0.75      
Private Equity Offering | Maximum                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Exercise price of warrants, per share               $ 1.00      
Private Equity Offering | Warrants                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Warrants to purchase common shares, shares           182,375   23,254,230      
Exercise price of warrants, per share           $ 1.35          
Private Equity Offering | Investors and Placement Agent | Warrants                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Warrants to purchase common shares, shares           182,375          
Private Equity Offering | Placement Agent                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Warrants to purchase common shares, shares               4,960,314      
Non Cash Exercise | Private Equity Offering                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Warrants to purchase common shares, shares             138,864        
Warrants Determined to Extend Expiration Dates                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Warrants to purchase common shares, shares 6,310,667     6,310,667              
Exercise price of warrants, per share $ 1.00     $ 1.00              
Extended expiration date of warrants       May 31, 2017              
October Twenty Sixteen Warrants                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Number of warrants 2     2              
Warrants exercisable period, closing month/year       2016-10              
December Twenty Sixteen Warrants                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Warrants to purchase common shares, shares 186,667     186,667              
Number of warrants 1     1              
Warrants exercisable period, closing month/year       2016-12              
January Twenty Seventeen Warrants                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Warrants to purchase common shares, shares 160,000     160,000              
Number of warrants 1     1              
Warrants exercisable period, closing date       Jan. 15, 2017              
Exercise Price 1 | Private Equity Offering                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Exercise price of warrants, per share           $ 1.35          
Exercise Price 2 | Private Equity Offering                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Exercise price of warrants, per share             $ 0.50        
Exercise Price 3 | Private Equity Offering                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Exercise price of warrants, per share             0.75        
Exercise Price 4 | Private Equity Offering                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Exercise price of warrants, per share             $ 0.75        
Securities Purchase Agreement                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Warrants to purchase common shares, shares   2,000,000     6,666,667   5,602,821        
Term of warrants   5 years     5 years   5 years        
Exercise price of warrants, per share   $ 1.00     $ 1.00   $ 1.00        
Time Based Options                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Stock options granted, exercise price             $ 0.76        
Stock options, term             10 years        
Vesting period             2 years        
Stock options grant date fair value             $ 0.64        
Time Based Options | Executive Chairman                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Stock options granted, shares             550,000        
Milestone Options [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Stock options granted, shares             450,000        
2012 Equity Incentive Plan                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Compensation expense             $ 1,205,000 $ 2,353,000      
Grant date fair value of options and warrants             949,000 $ 1,712,000      
Unrecognized compensation expense             $ 940,000        
Weighted average period over which unrecognized compensation expense is expected to be recognized             1 year 9 months 11 days        
2012 Equity Incentive Plan | Directors                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Stock options granted, shares             7,123        
Stock options granted, exercise price             $ 0.61        
Stock options, term             10 years        
Stock options grant date fair value             $ 0.36        
2012 Equity Incentive Plan | Stock Options                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Shares available for future stock-based grants             7,543,807        
2012 Equity Incentive Plan | Stock Options | Before Amendment                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Shares available for future issuance                 7,000,000 5,000,000 3,000,000
2012 Equity Incentive Plan | Stock Options | After amendment                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Shares available for future issuance                 15,000,000 7,000,000 5,000,000
2012 Equity Incentive Plan | Stock Options | Directors                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Stock options granted, shares             300,000        
Stock options granted, exercise price             $ 1.09        
Stock options grant date fair value             $ 0.78        
2012 Equity Incentive Plan | Stock Options | Directors | Minimum                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Vesting period             1 year        
2012 Equity Incentive Plan | Stock Options | Directors | Maximum                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Vesting period             10 years        
2012 Equity Incentive Plan | Stock Options | Director 2                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Stock options granted, shares             100,000        
Stock options granted, exercise price             $ 0.68        
Stock options grant date fair value             $ 0.53        
Vesting rights percentage             25.00%        
2012 Equity Incentive Plan | Stock Options | Director 2 | Minimum                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Stock options, term             1 year        
2012 Equity Incentive Plan | Stock Options | Director 2 | Maximum                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Stock options, term             10 years        
2012 Equity Incentive Plan | Stock Options | Executive Management and Employees                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Stock options granted, shares             1,050,000        
Stock options, term             10 years        
Vesting period             3 years        
Stock options granted, exercise price, lower range limit             $ 1.09        
Stock options granted, exercise price, upper range limit             1.10        
2012 Equity Incentive Plan | Stock Options | Executive Management and Employees | Minimum                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Stock options grant date fair value             0.75        
2012 Equity Incentive Plan | Stock Options | Executive Management and Employees | Maximum                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Stock options grant date fair value             $ 0.76