Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Narrative (Details)

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Stock-Based Compensation - Narrative (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Jan. 01, 2024
Jan. 01, 2023
Apr. 05, 2016
Mar. 31, 2024
Mar. 31, 2023
Jun. 30, 2023
Dec. 31, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Total stock-based compensation       $ 629 $ 855    
Employee Stock Purchase Plan (ESPP)              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Common stock remaining for future issuance (in shares)       958      
Purchase price of common stock, percentage     85.00%        
Maximum portion of earning an employee may contribute to the ESPP Plan     15.00%        
Maximum annual amount of fair market value of the company's common stock that a participant may accrue the rights to purchase     $ 25        
Shares of common stock for future issuance (in shares)     174        
Automatic increase to shares authorized as percentage of outstanding stock at end of preceding year     1.00%        
Service Based Options              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Options vested (in shares)       545      
Weighted average exercise price (in dollars per share)       $ 1,598      
Fair value of options vested in period       $ 600      
Total stock-based compensation       600      
Compensation not yet recognized       $ 2,200      
Period for recognition       1 year 4 months 24 days      
Exercisable stock options (in shares)       7,195     7,211
Weighted average share price (in dollars per share)       $ 3,192     $ 3,192
Weighted average remaining contractual term       8 years   8 years 3 months 18 days  
Market Based Options              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Exercisable stock options (in shares)       348      
Weighted average share price (in dollars per share)       $ 9,488      
Weighted average remaining contractual term       2 months 12 days      
Exercise of stock options (in shares)       0      
Forfeited (in shares)       0      
Granted (in shares)       0      
2016 Plan              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Annual share reserve increase       4.00%      
Increase in number of shares reserved for issuance (in shares)   32,070          
Common stock remaining for future issuance (in shares)       32,520      
2016 Plan | Equity Option              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Award expiration period       10 years      
2016 Plan | Equity Option | Maximum | Director              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Award vesting period       3 years      
2016 Plan | Equity Option | Maximum | Employee              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Award vesting period       4 years      
2016 Plan | Equity Option | Minimum | Director              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Award vesting period       1 year      
Employee Stock Purchase Plan (ESPP)              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Increase in number of shares reserved for issuance (in shares) 174