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Equity Incentive Plans (Tables)
 6 Months Ended
Mar. 31, 2024
Equity Incentive Plans [Abstract]  
Summary of Activity in the Company's RSUs A summary of activity in the Company’s RSUs for the six months ended March 31, 2024 is as follows:
   Number
of units		   Weighted-Average
Grant Date Fair
Value per Unit		 
         
Outstanding at September 30, 2023   209,494   $6.84 
Performance-based RSUs   3,999,999   $8.65 
Vested   (130,934)  $6.84 
Outstanding at March 31, 2024   4,078,559   $8.61 
Schedule of Stock Option Activity Stock option activity for the six months ended March 31, 2024 is as follows:
   Number
of Options		   Weighted-
Average
Exercise Price
per Share		   Weighted-
Average
Remaining
Contractual
Term (years)		 
Outstanding at September 30, 2023   5,905,684   $4.28            
Granted   32,200   $6.84      
Exercised   (474,313)  $5.91      
Forfeited   (941,042)  $6.53      
Outstanding at March 31, 2024   4,522,529   $3.66    6.3 
Exercisable at March 31, 2024   4,041,704   $3.29    6.1 
Schedule of Weighted-Average Grant Date Fair Value of Options Granted The fair value of stock options granted was estimated with the following assumptions:
   Six months ended March 31, 
   2024   2023 
   Range   Range 
   Low   High   Low   High 
                 
Expected volatility   54.8%   55.6%   52.4%   53.6%
Expected dividend yield   0%   0%   0%   0%
Risk-free interest rate   3.9%   4.4%   3.6%   4.2%
Expected term (years)   4.5    5.3    5.0    5.8 
Schedule of Consolidated Statements of Operations and Comprehensive Loss The condensed consolidated statements of operations and comprehensive loss include stock-based compensation expense as follows:
   Three months ended
March 31,		   Six months ended
March 31,		 
   2024   2023   2024   2023 
                 
Cost of revenue  $
—
   $11   $
—
   $22 
Research and development   274    541    775    1,083 
Selling, general and administrative   1,167    5,227    13,371    8,530 
Total stock-based compensation expense  $1,441   $5,779   $14,146   $9,635