Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Additional Information (Detail)

v3.22.2.2
Stockholders' Equity - Additional Information (Detail) - USD ($)
1 Months Ended 3 Months Ended
Aug. 19, 2022
Aug. 02, 2022
Sep. 28, 2021
Aug. 19, 2021
Sep. 30, 2014
Sep. 30, 2022
Sep. 30, 2021
Jun. 30, 2022
Class Of Stock [Line Items]                
Preferred stock, par value           $ 0.001   $ 0.001
Underwritten public offering, description           the Company closed on the sale of (i) 7,200 shares of its common stock, par value $0.001 per share, (ii) pre-funded warrants (“PFW”) to purchase an aggregate of 4,800 shares of common stock and (iii) common warrants to purchase an aggregate of 12,000 shares of common stock (“2022 Investor Warrants”) in the Company’s registered direct offering (the “September Offering”). Each share of common stock, or PFW as applicable, was sold together with a 2022 Investor Warrant to purchase one share of common stock at a combined effective price of $1.25 per share of common stock and accompanying 2022 Investor Warrant. The 2022 Investor Warrants have been valued at $7,023 and have been treated as equity. They have been valued using a Black-Scholes valuation with a risk-free rate of 0.55%, a contractual term of 3.5 years, a volatility of 116.7%, and a dividend rate of 0%.    
Common stock, shares issued           80,807,000   65,533,000
Warrants exercised for cash             $ 74,000  
Number of options granted           3,481,000    
Number of stock options outstanding           12,291,000    
Weighted average contractual term           9 years 4 months 13 days 9 years 10 days  
2017 Omnibus Incentive Plan                
Class Of Stock [Line Items]                
Common stock, shares issued           22,000,000    
Percentage of fully diluted shares of common stock           8.00%    
Common stock, shares outstanding           117,000    
Common stock issued under the 2017 Plan           9,515,000 12,174,000  
Two Thousand And Seventeen Omnibus Incentive Plan                
Class Of Stock [Line Items]                
Stock option vesting description           vest in 12 equal monthly installments beginning on August 1, 2022. The remaining 3,181 stock options granted have an exercise price of $0.1757 per share and vest as to 25% on August 1, 2023, with the remaining portion vesting in equal monthly installments over a period of 36 months commencing on September 1, 2023. All of the options to purchase shares of common stock granted have a 10-year term and are subject to cancellation upon the grantees’ termination of service for the Company, with certain exceptions.    
Stock option term           10 years    
Two Thousand And Seventeen Omnibus Incentive Plan | Exercise Price of 1.24 [Member]                
Class Of Stock [Line Items]                
Number of options granted           3,481,000    
Stock options exercise price           $ 0.255    
Two Thousand And Seventeen Omnibus Incentive Plan | Exercise Price Of Zero Point Nine Six                
Class Of Stock [Line Items]                
Stock option exercise price           $ 0.1757    
Stock options [Member]                
Class Of Stock [Line Items]                
Risk free rate           2.67%    
Expected term           6 years 29 days    
Volatility rate           91.40%    
Number of options granted           3,481,000    
Number of stock options outstanding           12,291,000   8,810,000
Aggregate intrinsic value of stock options outstanding           $ 0 $ 235,000  
Aggregate intrinsic value of stock options exercisable           0 197,000  
Unrecognized compensation expense           $ 1,757,000    
Unrecognized compensation expense, term           3 years 3 months 25 days    
Aggregate intrinsic value of unvested stock options           $ 332,000 $ 38,000  
Common stock                
Class Of Stock [Line Items]                
Issued warrants to underwriters     7,200,000          
Warrants exercise price     $ 0.001          
Pre-Funded Warrants                
Class Of Stock [Line Items]                
Issued warrants to underwriters     4,800,000          
Warrants exercise price             $ 0.001  
Number             4,800,000  
Warrants exercised for cash             $ 4,800  
2022 Investor Warrant [Member]                
Class Of Stock [Line Items]                
Issued warrants to underwriters     12,000,000          
Value of outstanding warrants     $ 7,023,000          
Risk free rate     0.55%          
Expected term     3 years 6 months          
Volatility rate     116.70%          
Dividend rate     0.00%          
Other Underwriting Expense     $ 13,634,000          
Expiry date     Mar. 28, 2025          
Executive Officers And Director | Two Thousand And Seventeen Omnibus Incentive Plan | Exercise Price Of Zero Point Nine Six                
Class Of Stock [Line Items]                
Number of options granted           3,181,000    
Executive Officers and Directors | Two Thousand And Seventeen Omnibus Incentive Plan | Exercise Price of 1.24 [Member]                
Class Of Stock [Line Items]                
Number of options granted           300,000    
Officers [Member] | Restricted Stock Units [Member]                
Class Of Stock [Line Items]                
Shares issued of common stock for services           880,000    
Stock option commencing date, description           Subject to providing continuous service to the Company, the RSU vest in four equal annual installments commencing August 1, 2023.    
Maximum [Member]                
Class Of Stock [Line Items]                
Gross proceeds           $ 1,908,000    
Preferred Stock Series C                
Class Of Stock [Line Items]                
Dividends, Preferred Stock $ 2,174,000              
Sale of Stock, Price Per Share $ 0.1667              
Preferred stock $ 362,000         12,275,000   $ 12,275,000
Liquidation value           $ 16,838   $ 16,838
Preferred Stock, shares issued           17,000   17,000
Number           16,838,000    
Series C-1 Preferred Shares [Member]                
Class Of Stock [Line Items]                
Conversion price           $ 1.16    
Number           13,945,000    
Series C-2 Preferred Shares [Member]                
Class Of Stock [Line Items]                
Conversion price           $ 1.214    
Number           898,000    
Series C-3 Preferred Shares                
Class Of Stock [Line Items]                
Conversion price           $ 1.15    
Number           1,995,000    
Preferred Stock Series A                
Class Of Stock [Line Items]                
Preferred stock           $ 279,000   $ 279,000
Liquidation value           $ 279,000   $ 279,000
Preferred stock, rate of dividend         3.00%      
Preferred Stock, shares issued           279,000   279,000
Change in preferred stock           $ 0 $ 0  
Preferred Stock Series A | Exchange Agreement [Member]                
Class Of Stock [Line Items]                
Preferred stock, rate of dividend         3.00%      
Preferred Stock, shares issued         279,000      
Preferred stock, par value         $ 1.00      
Private Placement [Member] | Series C Preferred Stock Warrants                
Class Of Stock [Line Items]                
Shares issued of common stock for services           2,504    
Shares issued, price per share           $ 1,000    
Registered direct financing [Member] | 2022 Investor Warrant [Member]                
Class Of Stock [Line Items]                
Number     600,000          
Registered direct financing [Member] | 2022 Agent Warrants [Member]                
Class Of Stock [Line Items]                
Warrants exercise price     $ 1.5265          
Risk free rate     0.55%          
Expected term     3 years 6 months          
Volatility rate     116.70%          
Dividend rate     0.00%          
Expiry date     Sep. 28, 2021          
Underwriter warrants commencing date     Mar. 28, 2025          
Non cash issue of common stock     333,000          
Merger Agreement [Member] | Preferred Stock Series C | First Anniversary [Member]                
Class Of Stock [Line Items]                
Common stock dividends percentage       10.00%        
Merger Agreement [Member] | Preferred Stock Series C | Second Anniversary [Member]                
Class Of Stock [Line Items]                
Common stock dividends percentage 15.00%              
Merger Agreement [Member] | Private Placement [Member] | Preferred Stock Series C                
Class Of Stock [Line Items]                
Shares issued of common stock for services           25,028    
Shares issued, price per share           $ 1,000    
Merger Agreement [Member] | Private Placement [Member] | Preferred Stock Series C | First Anniversary [Member]                
Class Of Stock [Line Items]                
Common stock dividends percentage           10.00%    
Merger Agreement [Member] | Private Placement [Member] | Preferred Stock Series C | Second Anniversary [Member]                
Class Of Stock [Line Items]                
Common stock dividends percentage           15.00%    
Merger Agreement [Member] | Private Placement [Member] | Preferred Stock Series C | Third Anniversary [Member]                
Class Of Stock [Line Items]                
Common stock dividends percentage           20.00%    
Merger Agreement [Member] | Private Placement [Member] | Preferred Stock Series C | Fourth Anniversary [Member]                
Class Of Stock [Line Items]                
Common stock dividends percentage           25.00%    
Purchase Agreement [Member]                
Class Of Stock [Line Items]                
Sale of Stock, Price Per Share   $ 0.2024            
Shares issued of common stock for services   1,630,000            
Amount of purchase common stock issued   $ 20,000,000            
Maximum committed purchase obligation   $ 2,000,000            
Aggregate number of shares sell   13,100,000            
Percentage of aggregate number of shares sell   19.99%            
Gross proceeds           $ 1,903,000    
Common stock, shares issued           11,470,000    
Purchase Agreement [Member] | Regular Purchase [Member]                
Class Of Stock [Line Items]                
Shares issued of common stock for services   500,000