Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Additional Information (Detail)

v3.21.2
Stockholders' Equity - Additional Information (Detail)
1 Months Ended 3 Months Ended 12 Months Ended
Sep. 28, 2021
USD ($)
$ / shares
shares
Aug. 19, 2021
USD ($)
$ / shares
Sep. 30, 2014
$ / shares
shares
Sep. 30, 2021
USD ($)
$ / shares
shares
Sep. 30, 2020
USD ($)
shares
Jun. 30, 2021
USD ($)
$ / shares
shares
Jun. 30, 2016
shares
Apr. 29, 2021
shares
Class Of Stock [Line Items]                
Non cash dividends of preferred stock | $         $ 3,181,000      
Preferred stock, par value | $ / shares       $ 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 (the “Common Stock”), (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 “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       47,974,000   32,740,000    
Warrants exercised for cash | $       $ 74,000 $ 994,000      
Number of options granted       435,000        
Number of stock options outstanding       6,809,000        
Weighted average contractual term       9 years 10 days 9 years 9 months 29 days      
Stock options [Member]                
Class Of Stock [Line Items]                
Aggregate intrinsic value of stock options outstanding | $       $ 235,000 $ 977,000      
Aggregate intrinsic value of stock options exercisable | $       197,000 447,000      
Unrecognized compensation expense | $       $ 2,597        
Unrecognized compensation expense, term       2 years 6 months 29 days        
Aggregate intrinsic value of unvested stock options | $       $ 38,000 $ 531,000      
2017 Omnibus Incentive Plan                
Class Of Stock [Line Items]                
Common stock, shares issued       13,000        
Percentage of fully diluted shares of common stock       8.00%        
Common stock, shares outstanding       129        
Common stock issued under the 2017 Plan       6,680 5,997      
Two Thousand And Seventeen Omnibus Incentive Plan                
Class Of Stock [Line Items]                
Stock option vesting description       They vest in 12 equal monthly installments beginning on October 22, 2021.  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       435,000        
Stock option exercise price | $ / shares       $ 1.24        
Stock options [Member]                
Class Of Stock [Line Items]                
Risk free rate       1.55%        
Expected term       5 years 3 months 18 days        
Volatility rate       93.90%        
Number of options granted       435,000        
Number of stock options outstanding       6,809,000   6,392,000    
Stock options [Member] | CA$ $20.00 Exercise Price                
Class Of Stock [Line Items]                
Number of stock options outstanding       2,500        
Stock options exercise price | $ / shares       $ 15.77        
Common stock                
Class Of Stock [Line Items]                
Series B preferred stock dividend, shares         4,000      
Issued warrants to underwriters 7,200,000              
Warrants exercise price | $ / shares $ 0.001              
Pre-Funded Warrants                
Class Of Stock [Line Items]                
Issued warrants to underwriters 4,800,000              
Warrants exercise price | $ / shares       $ 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              
Placement Agent | Series C Agent Warrants [Member]                
Class Of Stock [Line Items]                
Fair value disclosure | $       $ 3,287,000        
Warrants outstanding, term       4 years        
Measurement Input, Risk Free Interest Rate | Placement Agent | Series C Agent Warrants [Member]                
Class Of Stock [Line Items]                
Warrants outstanding, measurement input       0.27        
Measurement Input, Price Volatility | Minimum | Placement Agent | Series C Agent Warrants [Member]                
Class Of Stock [Line Items]                
Warrants outstanding, measurement input       95.2        
Measurement Input, Price Volatility | Maximum | Placement Agent | Series C Agent Warrants [Member]                
Class Of Stock [Line Items]                
Warrants outstanding, measurement input       95.8        
Preferred Stock Series C                
Class Of Stock [Line Items]                
Shares issued of common stock for services           25,028    
Dividends, Preferred Stock | $   $ 1,698,000            
Sale of Stock, Price Per Share | $ / shares   $ 1.45            
Preferred stock | $   $ 2,462,000   $ 13,396,000   $ 14,652,000    
Non cash dividends of preferred stock | $       3,181,000        
Liquidation value | $       $ 18,382   $ 20,092    
Preferred Stock, shares issued       18,000   0    
Number       18,382,000        
Preferred Stock Series C | Placement Agent | Series C Agent Warrants [Member]                
Class Of Stock [Line Items]                
Shares issued of common stock for services       2,504        
Fair value of preferred stock | $       $ 3,287,000        
Series C-1 Preferred Shares [Member]                
Class Of Stock [Line Items]                
Conversion price | $ / shares       $ 1.16        
Number       15,439,000        
Series C-2 Preferred Shares [Member]                
Class Of Stock [Line Items]                
Conversion price | $ / shares       $ 1.214        
Number       898,000        
Series C-3 Preferred Shares [Member]                
Class Of Stock [Line Items]                
Conversion price | $ / shares       $ 1.15        
Number       2,045,000        
Series B Preferred Stock                
Class Of Stock [Line Items]                
Shares issued of common stock for services             902,000  
Convertible preferred stock               601,000
Preferred stock, rate of dividend       9.00%        
Series B preferred stock dividend, shares         4      
Direct increase in accumulated deficit | $         $ 5,000      
Common stock                
Class Of Stock [Line Items]                
Convertible preferred stock               150,000
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 | $ / shares     $ 1.00          
Private Placement [Member] | Preferred Stock Series C                
Class Of Stock [Line Items]                
Total gross proceeds | $       25,028,000        
Net proceeds from private placement | $       21,573,000        
Deferred financing costs | $       $ 3,455,000        
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 | $ / shares       $ 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 | $ / shares $ 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] | 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 | $ / shares       $ 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%