Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Additional Information (Detail)

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Stockholders' Equity - Additional Information (Detail)
1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Sep. 28, 2021
USD ($)
$ / shares
shares
Aug. 19, 2021
USD ($)
$ / shares
Sep. 30, 2014
$ / shares
shares
Dec. 31, 2021
USD ($)
$ / shares
shares
Dec. 31, 2020
USD ($)
shares
Sep. 30, 2020
shares
Dec. 31, 2021
USD ($)
$ / shares
shares
Dec. 31, 2020
USD ($)
shares
Jun. 30, 2016
shares
Jun. 30, 2021
USD ($)
$ / shares
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     $ 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       49,013,000     49,013,000     32,740,000  
Warrants exercised for cash | $             $ 74,000 $ 1,180,000      
Number of options granted             3,954,000        
Number of stock options outstanding       10,089,000     10,089,000        
Stock options exercise price | $ / shares       $ 19.89     $ 19.89        
Weighted average contractual term             9 years 4 months 9 days 9 years 7 months 20 days      
Stock options [Member]                      
Class Of Stock [Line Items]                      
Aggregate intrinsic value of stock options outstanding | $         $ 789,000     $ 789,000      
Aggregate intrinsic value of stock options exercisable | $         $ 572,000     572,000      
Unrecognized compensation expense | $       $ 3,938     $ 3,938        
Unrecognized compensation expense, term             3 years 10 months 9 days        
Aggregate intrinsic value of unvested stock options | $               $ 218,000      
2017 Omnibus Incentive Plan                      
Class Of Stock [Line Items]                      
Common stock, shares issued       13,000     13,000        
Percentage of fully diluted shares of common stock             8.00%        
Common stock, shares outstanding       129     129        
Common stock issued under the 2017 Plan       9,960 2,717   9,960 2,717      
Two Thousand And Seventeen Omnibus Incentive Plan                      
Class Of Stock [Line Items]                      
Stock option vesting description             vest in 12 equal monthly installments beginning on October 22, 2021. The remaining 3,519 stock options granted have an exercise price of $0.96 per share and vest as to 25% on November 8, 2022, with the remaining portion vesting in equal monthly installments over a period of 36 months commencing on December 8, 2022. 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. In addition, 2,715 stock options previously issued to an officer of the Company were modified such that 754 stock options that were to vest over the period December 15, 2022, to September 15, 2023, now vest on a contingent basis dependent on the achievement of certain strategic partnership initiatives. In relation to the termination of an officer of the Company, the Company has recognized $31 in stock option expense due to the acceleration of vesting of certain stock options granted to that officer.        
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             3,954,000        
Stock option exercise price | $ / shares             $ 1.24        
Two Thousand And Seventeen Omnibus Incentive Plan | Exercise Price Of Zero Point Nine Six                      
Class Of Stock [Line Items]                      
Stock option exercise price | $ / shares             $ 0.96        
Stock options [Member]                      
Class Of Stock [Line Items]                      
Risk free rate             1.78%        
Expected term             5 years 11 months 26 days        
Volatility rate             91.68%        
Number of options granted             3,954,000        
Number of stock options outstanding       10,089,000     10,089,000     6,392,000  
Stock options [Member] | CA$ $20.00 Exercise Price                      
Class Of Stock [Line Items]                      
Number of stock options outstanding       2,500     2,500        
Stock options exercise price | $ / shares       $ 15.75     $ 15.75        
Common stock                      
Class Of Stock [Line Items]                      
Series B preferred stock dividend, shares         3,000 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     $ 0.001        
Number       4,800,000     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     $ 3,287,000        
Warrants outstanding, term       4 years     4 years        
Executive Officers And Director | Two Thousand And Seventeen Omnibus Incentive Plan | Exercise Price of 1.24 [Member]                      
Class Of Stock [Line Items]                      
Number of options granted             435,000        
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             3,519,000        
Measurement Input, Risk Free Interest Rate | Placement Agent | Series C Agent Warrants [Member]                      
Class Of Stock [Line Items]                      
Warrants outstanding, measurement input       0.27     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     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     95.8        
Preferred Stock Series C                      
Class Of Stock [Line Items]                      
Dividends, Preferred Stock | $   $ 1,698,000                  
Sale of Stock, Price Per Share | $ / shares   $ 1.45                  
Preferred stock | $   $ 2,462,000   $ 12,522,000     $ 12,522,000     $ 14,652,000  
Non cash dividends of preferred stock | $               $ 3,181,000      
Liquidation value | $       $ 17,177     $ 17,177     $ 20,092  
Preferred Stock, shares issued       17,000     17,000     20,000  
Number       17,177,000     17,177,000        
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     $ 1.16        
Number       14,234,000     14,234,000        
Series C-2 Preferred Shares [Member]                      
Class Of Stock [Line Items]                      
Conversion price | $ / shares       $ 1.214     $ 1.214        
Number       898,000     898,000        
Series C-3 Preferred Shares [Member]                      
Class Of Stock [Line Items]                      
Conversion price | $ / shares       $ 1.15     $ 1.15        
Number       2,045,000     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         3     7      
Direct increase in accumulated deficit | $         $ 4,000     $ 9,000      
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     $ 279,000  
Liquidation value | $       $ 279,000     $ 279,000     $ 279,000  
Preferred stock, rate of dividend     3.00%                
Preferred Stock, shares issued       279,000     279,000     279,000  
Change in preferred stock | $       $ 0 $ 0   $ 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     $ 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     $ 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%