Quarterly report pursuant to Section 13 or 15(d)

Convertible Redeemable Preferred Stock and Stockholders' Equity (Details)

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Convertible Redeemable Preferred Stock and Stockholders' Equity (Details)
3 Months Ended 9 Months Ended 12 Months Ended
Apr. 04, 2024
May 15, 2023
USD ($)
$ / shares
shares
Jan. 24, 2023
Sep. 13, 2021
shares
Mar. 31, 2024
USD ($)
shares
Sep. 30, 2023
shares
Mar. 31, 2023
USD ($)
shares
Sep. 30, 2022
shares
Mar. 31, 2021
USD ($)
Sep. 30, 2023
shares
Sep. 30, 2022
shares
Dec. 31, 2023
shares
Mar. 15, 2024
Jul. 26, 2023
Jan. 23, 2023
Aug. 15, 2022
$ / shares
shares
Mar. 31, 2018
shares
Jan. 30, 2018
Convertible Preferred Stock and Stockholders' Equity                                    
Shares issued         0             38,335            
Aggregate shares issued upon exercise of warrants (in shares)         0   7,454                      
Issuance of common stock upon warrant exchanged             5,705                      
Number of shares authorized         375,000             375,000            
Number of shares outstanding         0             38,335            
Proceeds from exercise of warrants | $         $ 714,000   $ 32,000                      
Stock-based compensation | $         $ 64,000                          
Shares unvested         16                          
Change in fair value of warrant liabilities | $         $ 8,129,000   $ 5,604,000                      
Reverse stock split ratio 0.0067   0.01                              
Maxim Group LLC                                    
Convertible Preferred Stock and Stockholders' Equity                                    
Aggregate shares issued upon exercise of warrants (in shares)                               13    
Warrants exercise price (in $ per share) | $ / shares                               $ 14,955.00    
Warrant                                    
Convertible Preferred Stock and Stockholders' Equity                                    
Aggregate shares issued upon exercise of warrants (in shares)         1             1            
Issuance of common stock upon warrant exchanged         1,536,775             187,557            
Restricted stock                                    
Convertible Preferred Stock and Stockholders' Equity                                    
Unamortized compensation costs | $         $ 1,138,000                          
Number of stock released         20                          
Weighted-average period         8 months 12 days                          
Shares unvested         5,354             5,382            
LTSI                                    
Convertible Preferred Stock and Stockholders' Equity                                    
Maximum shares authorized to issue, percentage         15.00%                         15.00%
Percentage of maximum shares issued in a year     15   8                   8      
Number of shares available for grant                                 263,570  
LTSI | Restricted stock units                                    
Convertible Preferred Stock and Stockholders' Equity                                    
Number of stock released         20   0                      
September 2021 Inducement Grant                                    
Convertible Preferred Stock and Stockholders' Equity                                    
Vesting term                 6 months                  
Unrecognized tax benefits, interest on income taxes expense | $                 $ 121,000                  
September 2021 Inducement Grant | Restricted stock                                    
Convertible Preferred Stock and Stockholders' Equity                                    
Number of restricted shares granted             0                      
September 2021 Inducement Grant | Restricted stock units                                    
Convertible Preferred Stock and Stockholders' Equity                                    
Number of units issued       21                            
2020 Stock Incentive Plan | Restricted stock                                    
Convertible Preferred Stock and Stockholders' Equity                                    
Unamortized compensation costs | $         $ 0                          
Number of stock released         1   0                      
Aggregate intrinsic value | $         $ 1,000                          
2020 Stock Incentive Plan | Restricted stock units                                    
Convertible Preferred Stock and Stockholders' Equity                                    
Unamortized compensation costs | $         $ 106,000                          
Number of stock released         1                          
Weighted-average period         2 years 2 months 12 days                          
Shares unvested                       1            
2022 | Restricted stock units                                    
Convertible Preferred Stock and Stockholders' Equity                                    
Number of stock released         3   0                      
Aggregate intrinsic value | $         $ 1,000                          
Shares unvested         14             17            
2022 Plan | Restricted stock                                    
Convertible Preferred Stock and Stockholders' Equity                                    
Number of restricted shares granted           3   3   3 3              
Minimum                                    
Convertible Preferred Stock and Stockholders' Equity                                    
Maximum shares authorized to issue, percentage                         8.00%          
Inducement Warrants | Private Placement Warrants                                    
Convertible Preferred Stock and Stockholders' Equity                                    
Aggregate shares issued upon exercise of warrants (in shares)   9,907                                
Net proceeds | $   $ 1,900,000                                
Exercise price | $ / shares   $ 199.50                                
Warrants to purchase shares of common stock for cash   19,815                                
Maxim Group LLC                                    
Convertible Preferred Stock and Stockholders' Equity                                    
Aggregate shares issued upon exercise of warrants (in shares)                               13    
Common stock                                    
Convertible Preferred Stock and Stockholders' Equity                                    
Percentage of exercise of warrants issued                           100.00%