Stock-based Compensation and Equity Grants - Stock Option Activity (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Number of Shares
Outstanding at beginning of period (in shares)	2,278
Exercised (in shares)	(760)
Cancelled (in shares)	(282)
Outstanding at end of period (in shares)	1,236	2,278
Exercisable at end of period (in shares)	1,177
Weighted Average Exercise Price
Outstanding at beginning of period (in dollars per share)	$ 8.40
Exercised (in dollars per share)	4.12
Cancelled (in dollars per share)	14.73
Outstanding at end of period (in dollars per share)	9.28	$ 8.40
Exercisable at end of period (in dollars per share)	$ 9.37
Weighted Average Remaining Contractual Term (in years)
Weighted Average Remaining Contractual Term, Options Outstanding at beginning of period (in years)	6 years 1 month 6 days	5 years 9 months 18 days
Weighted Average Remaining Contractual Term, Options Outstanding at period end (in years)	6 years 1 month 6 days	5 years 9 months 18 days
Weighted Average Remaining Contractual Term, Options Exercisable at period end (in years)	6 years
Aggregate Intrinsic Value
Aggregate Intrinsic Value for Options Outstanding at beginning of period	$ 8,693
Aggregate Intrinsic Value for Options Outstanding at period end	1,313	$ 8,693
Aggregate Intrinsic Value Options Outstanding at period end	$ 1,313