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Equity Financing - Additional Information (Detail) - USD ($)
 1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Mar. 06, 2023
Aug. 16, 2022
Mar. 31, 2023
Aug. 31, 2022
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Dec. 31, 2022
Jan. 31, 2021
Dec. 31, 2020
Jul. 31, 2020
May 31, 2020
Sep. 30, 2019
Class Of Warrant Or Right [Line Items]                            
Change in fair value of common stock warrant and option liabilities         $ 608,000 $ 1,880,000 $ 5,965,000 $ 1,880,000            
Exercised during the period             (307,647)   0          
Maximum [Member]                            
Class Of Warrant Or Right [Line Items]                            
Proceeds from issuance, aggregate offering prices             $ 50,000,000              
Common Stock and Pre-Funded Warrants [Member]                            
Class Of Warrant Or Right [Line Items]                            
Remaining offering costs allocated to common stock and offset to additional paid in capital $ 330,000 $ 365,000                        
August 2022 Purchase Agreement [Member]                            
Class Of Warrant Or Right [Line Items]                            
Shares of common stock issued       61,250                    
Offering closing period       Aug. 16, 2022                    
August 2022 Purchase Agreement [Member] | Pre Funded Warrants [Member]                            
Class Of Warrant Or Right [Line Items]                            
Warrant issued, shares of common stock called by warrant       56,813                    
Warrants issued, exercise price       $ 0.004                    
August 2022 Purchase Agreement [Member] | Preferred Investment Options [Member]                            
Class Of Warrant Or Right [Line Items]                            
Shares of common stock issued       118,063                    
Exercise price       $ 37.35                    
Proceeds from issuance of common stock, pre-funded warrants and preferred investment options from March 2023 PIPE       $ 5,000,000                    
Warrants expiration period       5 years                    
March 2023 Placement Agent Options [Member]                            
Class Of Warrant Or Right [Line Items]                            
Issuance costs allocated to liability preferred options $ 430,000                          
March 2023 Options and March 2023 Placement Agent Options [Member]                            
Class Of Warrant Or Right [Line Items]                            
Expected volatility 128.55%                          
Stock price $ 7.61                          
Risk-free interest rate 4.27%                          
March 2023 Options and March 2023 Placement Agent Options [Member] | Series B Preferred Investment Options [Member]                            
Class Of Warrant Or Right [Line Items]                            
Expected volatility 103.33%                          
Stock price $ 7.61                          
Risk-free interest rate 4.97%                          
August 2022 Options and August 2022 Placement Agent Options [Member]                            
Class Of Warrant Or Right [Line Items]                            
Expected volatility   128.46%                        
Stock price   $ 37.6                        
Risk-free interest rate   2.97%                        
Expected term   5 years                        
August 2022 Placement Agent Options [Member]                            
Class Of Warrant Or Right [Line Items]                            
Fair value assumptions, value   $ 191,000                        
Offering costs   488,000                        
Issuance costs allocated to liability preferred options   314,000                        
August 2022 Placement Agent Options [Member] | Warrants [Member]                            
Class Of Warrant Or Right [Line Items]                            
Offering costs   $ 679,000                        
August 2022 Placement Agent Options [Member] | August 2022 Purchase Agreement [Member] | Warrants [Member]                            
Class Of Warrant Or Right [Line Items]                            
Warrant issued, shares of common stock called by warrant       5,904                    
Warrants issued, exercise price       $ 52.8                    
Warrant, exercisable term       5 years                    
March 2023 Options [Member]                            
Class Of Warrant Or Right [Line Items]                            
Estimated fair value of liability options $ 6,600,000                          
March 2023 Private Placement [Member] | March 2023 Purchase Agreement [Member]                            
Class Of Warrant Or Right [Line Items]                            
Shares of common stock issued     165,500                      
Offering costs             548,000              
March 2023 Private Placement [Member] | March 2023 Purchase Agreement [Member] | Series A Preferred Investment Options [Member]                            
Class Of Warrant Or Right [Line Items]                            
Shares of common stock issued     666,334                      
Exercise price     $ 9                      
Options expiration period     5 years                      
March 2023 Private Placement [Member] | March 2023 Purchase Agreement [Member] | Series A and B Preferred Investment Options [Member]                            
Class Of Warrant Or Right [Line Items]                            
Shares of common stock issued     666,334                      
Exercise price     $ 9                      
Proceeds from issuance of common stock and warrants gross             $ 6,000,000              
March 2023 Private Placement [Member] | March 2023 Purchase Agreement [Member] | Series B Preferred Investment Options [Member]                            
Class Of Warrant Or Right [Line Items]                            
Options expiration period     1 year 6 months                      
March 2023 Private Placement [Member] | March 2023 Purchase Agreement [Member] | Pre Funded Warrants [Member]                            
Class Of Warrant Or Right [Line Items]                            
Warrant issued, shares of common stock called by warrant     500,834                      
Warrants issued, exercise price     $ 0.0001                      
Exercised during the period             250,834              
March 2023 Private Placement [Member] | March 2023 Purchase Agreement [Member] | Common Stock and Pre-Funded Warrants [Member]                            
Class Of Warrant Or Right [Line Items]                            
Fair value of common stock and pre-funded warrants 5,100,000                          
March 2023 Private Placement [Member] | Option Amendment Agreements [Member] | Preferred Investment Options [Member]                            
Class Of Warrant Or Right [Line Items]                            
Warrant issued, shares of common stock called by warrant     178,132                      
March 2023 Private Placement [Member] | Option Amendment Agreements [Member] | Warrants [Member]                            
Class Of Warrant Or Right [Line Items]                            
Warrants issued, exercise price     $ 9 $ 37.35           $ 125.2 $ 120 $ 154 $ 191 $ 300.8
March 2023 Private Placement [Member] | March 2023 Placement Agent Options [Member] | Preferred Investment Options [Member]                            
Class Of Warrant Or Right [Line Items]                            
Shares of common stock issued     33,317                      
March 2023 Private Placement [Member] | March 2023 Placement Agent Options [Member] | March 2023 Purchase Agreement [Member]                            
Class Of Warrant Or Right [Line Items]                            
Common stock options issued to placement agent and included in offering costs             $ 212,000              
March 2023 Private Placement [Member] | March 2023 Placement Agent Options [Member] | March 2023 Purchase Agreement [Member] | Warrants [Member]                            
Class Of Warrant Or Right [Line Items]                            
Warrant modification included in valuation loss             $ 404,000              
March 2023 Private Placement [Member] | March 2023 Placement Agent Options [Member] | Option Amendment Agreements [Member]                            
Class Of Warrant Or Right [Line Items]                            
Exercise price         $ 11.25   $ 11.25              
Warrant, exercisable term             5 years              
March 2023 Private Placement [Member] | August 2022 Placement Agent Options [Member] | August 2022 Purchase Agreement [Member] | Warrants [Member]                            
Class Of Warrant Or Right [Line Items]                            
Warrant modification included in valuation loss             $ 185,000              
March 2023 Private Placement [Member] | March 2023 Options [Member] | March 2023 Purchase Agreement [Member] | Common Stock and Pre-Funded Warrants [Member]                            
Class Of Warrant Or Right [Line Items]                            
Estimated fair value, loss $ 5,700,000