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Debt - Credit Facility (Details) - USD ($)
1 Months Ended 3 Months Ended 9 Months Ended
Jun. 30, 2020
Aug. 05, 2019
Jul. 31, 2021
Jul. 31, 2020
Aug. 31, 2019
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Debt                  
Other income (expense)           $ 69,000 $ (8,000) $ 56,000 $ (35,000)
2019 Credit Facility                  
Debt                  
Number of shares the warrant can be converted to   9,375              
Warrant exercise price   $ 8.91              
Amount bank could receive if takes the option to put the warrants upon expiration or a liquidity event   $ 50,000              
2019 Credit Facility | Prime Rate                  
Debt                  
Effective interest rate           5.50%   5.50%  
2019 Credit Facility - Revolving Line Of Credit                  
Debt                  
Loan agreement amount     $ 5,000,000.0            
Effective interest rate 6.75%     4.75%   8.03%   8.03%  
Commitment fee (as a percentage)         1.60%        
Termination fee (as a percentage)       1.00%          
Unused facility fee (as a percentage)       0.125%          
Remaining availability           $ 4,000,000.0   $ 4,000,000.0  
Outstanding balance           $ 1,000,000.0   $ 1,000,000.0  
2019 Credit Facility - Revolving Line Of Credit | Prime Rate                  
Debt                  
Interest rate, basis spread percentage     1.50%            
Effective interest rate           7.75%   7.75%  
2019 Credit Facility - Revolving Line Of Credit | Prime Rate | Minimum                  
Debt                  
Interest rate, basis spread percentage     4.75%            
2019 Credit Facility - Term Loan                  
Debt                  
End-of-term fee (as a percent)       7.00%          
Agreement term       46 months          
Effective interest rate 4.75%     3.75%   5.64%   5.64%  
Prepayment fee (as a percentage)       2.00%          
Debt amount       $ 6,000,000.0          
Number of months of interest only payment 12 months     16 months          
Number of months of equal principal payments       30 months          
Amount of principal payments       $ 200,000          
Outstanding balance           $ 2,200,000   $ 2,200,000  
2019 Credit Facility - Term Loan | Prime Rate                  
Debt                  
Interest rate, negative basis spread percentage       0.75%          
Effective interest rate       3.75%