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Stock-Based Compensation and Equity Grants - Stock Option Activity (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended
Dec. 31, 2024
Mar. 31, 2025
Sep. 30, 2024
Number of Shares      
Options outstanding, beginning (in shares) 1,237 1,237  
Granted (in shares)   0  
Exercised (in shares)   0  
Cancelled (in shares)   (100)  
Options outstanding, ending (in shares)   1,137  
Weighted Average Exercise Price      
Options outstanding, beginning (in dollars per share) $ 9.28 $ 9.28  
Granted (in dollars per share)   0  
Exercised (in dollars per share)   0  
Cancelled (in dollars per share)   13.43  
Options outstanding, ending (in dollars per share)   $ 9.25  
Weighted Average Remaining Contractual Term      
Weighted Average Remaining Contractual Term 6 years 1 month 6 days 5 years 6 months  
Aggregate Intrinsic Value      
Aggregate Intrinsic Value   $ 0 $ 1,313
Vested and exercisable (in shares)   1,077  
Vested and exercisable, weighted average exercise price (in dollars per share)   $ 8.99  
Vested and exercisable, weighted average remaining contractual term (in years)   5 years 4 months 13 days  
Vested and exercisable, intrinsic value   $ 0