Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Additional Information (Detail)

v3.10.0.1
Summary of Significant Accounting Policies - Additional Information (Detail)
 3 Months Ended 8 Months Ended 12 Months Ended
Nov. 01, 2017
shares
Aug. 31, 2018
USD ($)
shares
Aug. 31, 2017
USD ($)
shares
Aug. 31, 2018
USD ($)
shares
May 31, 2018
USD ($)
$ / shares
shares
Dec. 31, 2017
Jun. 07, 2018
shares
Aug. 24, 2017
shares
Aug. 23, 2017
shares
Apr. 30, 2010
shares
Summary Of Significant Accounting Policies [Line Items]                    
Net loss   $ (14,413,569) $ (11,628,273)              
Accumulated (deficit)   (187,552,964)   $ (187,552,964) $ (173,139,396)          
Balance in excess of federally insured limits   4,700,000   4,700,000 1,100,000          
Impairment charges   0 0              
Pre-launch inventory qualified for capitalization   $ 0   $ 0 $ 0          
Estimated future unvested forfeitures   0.00%                
Common stock, shares authorized | shares 200,000,000 450,000,000   450,000,000 375,000,000   450,000,000 375,000,000 350,000,000 100,000,000
Treasury stock, par value | $ / shares         $ 0.001          
Treasury stock, shares | shares         159,011          
Debt discount   $ 626,242   $ 626,242            
Amortization of discount on convertible notes   64,580 444,152              
Direct costs associated with the convertible notes   100,000     $ 400,000          
Amortization of debt issuance costs   $ 9,178 $ 113,700              
Common stock options and warrants to purchase | shares   145,856,851 80,582,715              
Unrecognized benefits   $ 0   $ 0            
Federal statutory income tax rate, percent       21.00%   35.00%        
Effective income tax rate reconciliation, at blended income tax rate, percent       28.62%            
Tax cuts and jobs act of 2017, incomplete accounting, change in tax rate, deferred tax liability, provisional income tax benefit         17,497,051          
Provision for taxes on income   0 $ 0   0          
Equity Securities                    
Summary Of Significant Accounting Policies [Line Items]                    
Deferred offering costs   1,000,000 0 $ 1,000,000 3,500,000          
Short-Term Convertible Notes                    
Summary Of Significant Accounting Policies [Line Items]                    
Amortization of debt issuance costs   9,000 114,000              
Short-Term Convertible Notes | Detachable Common Stock Warrants                    
Summary Of Significant Accounting Policies [Line Items]                    
Debt discount   600,000   $ 600,000 $ 1,500,000          
Amortization of discount on convertible notes   $ 65,000 $ 444,000              
Series B Convertible Preferred Stock                    
Summary Of Significant Accounting Policies [Line Items]                    
Preferred Stock Shares authorized to be issued | shares   400,000   400,000 400,000          
Common stock options and warrants to purchase | shares   92,100   92,100 92,100          
Common shares issued upon conversion of preferred stock | shares   921,000                
Maximum                    
Summary Of Significant Accounting Policies [Line Items]                    
Stockholders equity note stock split conversion ratio 0.067                  
Preferred Stock Shares authorized to be issued | shares   5,000,000   5,000,000            
Minimum                    
Summary Of Significant Accounting Policies [Line Items]                    
Stockholders equity note stock split conversion ratio 0.500