Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events - Additional Information (Detail)

v3.20.2
Subsequent Events - Additional Information (Detail) - USD ($)
1 Months Ended 3 Months Ended
Oct. 01, 2020
Sep. 30, 2020
Sep. 03, 2020
Aug. 31, 2020
Sep. 30, 2020
Aug. 31, 2020
Aug. 31, 2019
Sep. 21, 2020
Jul. 27, 2020
May 22, 2019
Aug. 24, 2017
Mar. 31, 2016
Feb. 28, 2015
Subsequent Event [Line Items]                          
Proceeds from Stock Options Exercised           $ 39,000            
Outstanding balance of convertible note including accrued unpaid interest                 $ 9,537,500        
Convertible note, redeemed amount           $ 4,476,000              
2012 Equity Incentive Plan | After Amendment                          
Subsequent Event [Line Items]                          
Shares available for future issuance       25,000,000   25,000,000              
2012 Incentive Plan Amended And Restated                          
Subsequent Event [Line Items]                          
Percentage Of Increase In Shares Issued On Proportion Of Outstanding Capital Stock On Last Day Of Each Fiscal Year       1.00%                  
Employee Stock Option [Member] | 2012 Equity Incentive Plan | After Amendment                          
Subsequent Event [Line Items]                          
Shares available for future issuance       25,000,000   25,000,000       25,000,000 15,000,000 7,000,000 5,000,000
Subsequent Event                          
Subsequent Event [Line Items]                          
Stock options with an exercise prices   $ 1.35                      
Stock options with an exercise prices   $ 0.50                      
Subsequent Event | Excercise Of Warrants And Options [Member]                          
Subsequent Event [Line Items]                          
Shares issued during the period exercise of warrants and options         818,241                
Proceeds from Stock Options Exercised         $ 600,000                
Subsequent Event | 2012 Equity Incentive Plan                          
Subsequent Event [Line Items]                          
Shares available for future issuance   50,000,000     50,000,000                
Subsequent Event | 2012 Incentive Plan Amended And Restated                          
Subsequent Event [Line Items]                          
Shares available for future issuance   50,000,000     50,000,000                
Share based compensation by share based payment arrangement restricted stock awards granted   1,120,000                      
Percentage Of Increase In Shares Issued On Proportion Of Outstanding Capital Stock On Last Day Of Each Fiscal Year   1.00%                      
Subsequent Event | Stock Compensation Plan [Member]                          
Subsequent Event [Line Items]                          
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Exercise Price     100,000                    
Subsequent Event | Restricted Stock Units (RSUs) | 2012 Incentive Plan Amended And Restated                          
Subsequent Event [Line Items]                          
Exercise price of stock options granted   $ 3.12                      
Subsequent Event | March 2020 Long Term Convertible Notes [Member]                          
Subsequent Event [Line Items]                          
Outstanding balance of convertible note including accrued unpaid interest $ 7,300,000                        
Convertible note, redeemed amount $ 950,000                        
Subsequent Event | Maximum [Member] | Stock Compensation Plan [Member]                          
Subsequent Event [Line Items]                          
Stock option granted, exercise price               $ 3.88          
Subsequent Event | Minimum [Member] | Stock Compensation Plan [Member]                          
Subsequent Event [Line Items]                          
Stock option granted, exercise price               $ 3.41          
Subsequent Event | Common Stock | 2012 Incentive Plan Amended And Restated                          
Subsequent Event [Line Items]                          
Share based compensation by share based payment arrangement restricted stock awards granted   4,350,000                      
Subsequent Event | Warrants                          
Subsequent Event [Line Items]                          
Shares issued during the period exercise of warrants and options         822,895                
Subsequent Event | Executive Officer | 2012 Incentive Plan Amended And Restated                          
Subsequent Event [Line Items]                          
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Exercise Price   3,350,000                      
Subsequent Event | Executive Officer | Employee Stock Option [Member] | 2012 Incentive Plan Amended And Restated                          
Subsequent Event [Line Items]                          
Share based compensation by share based payment arrangement vesting period   3 years                      
Exercise price of stock options granted   $ 3.12                      
Subsequent Event | Executive Officer | Restricted Stock Units (RSUs) | 2012 Incentive Plan Amended And Restated                          
Subsequent Event [Line Items]                          
Share based compensation by share based payment arrangement vesting period   3 years                      
Subsequent Event | Director One | Employee Stock Option [Member] | 2012 Incentive Plan Amended And Restated                          
Subsequent Event [Line Items]                          
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Exercise Price   168,750                      
Subsequent Event | Director Two | Employee Stock Option [Member] | 2012 Incentive Plan Amended And Restated                          
Subsequent Event [Line Items]                          
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Exercise Price   168,750                      
Subsequent Event | Director Three | Employee Stock Option [Member] | 2012 Incentive Plan Amended And Restated                          
Subsequent Event [Line Items]                          
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Exercise Price   168,750                      
Subsequent Event | Director | Employee Stock Option [Member] | 2012 Incentive Plan Amended And Restated                          
Subsequent Event [Line Items]                          
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Exercise Price   506,250                      
Exercise price of stock options granted   $ 6.15