Stock-based Compensation and Equity Grants - Stock Option Activity (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Number of Shares
Outstanding at beginning of period (in shares)	2,392
Granted (in shares)	470
Exercised (in shares)	(393)
Cancelled (in shares)	(191)
Outstanding at end of period (in shares)	2,278	2,392
Exercisable at end of period (in shares)	1,608
Weighted Average Exercise Price
Outstanding at beginning of period (in dollars per share)	$ 7.05
Granted (in dollars per share)	11.57
Exercised (in dollars per share)	3.42
Cancelled (in dollars per share)	9.54
Outstanding at end of period (in dollars per share)	8.40	$ 7.05
Exercisable at end of period (in dollars per share)	$ 6.43
Weighted Average Remaining Contractual Term (in years)
Weighted Average Remaining Contractual Term, Options Outstanding at beginning of period (in years)	5 years 9 months 18 days	5 years 4 months 24 days
Weighted Average Remaining Contractual Term, Options Outstanding at period end (in years)	5 years 9 months 18 days	5 years 4 months 24 days
Weighted Average Remaining Contractual Term, Options Exercisable at period end (in years)	4 years 3 months 18 days
Aggregate Intrinsic Value
Aggregate Intrinsic Value for Options Outstanding at beginning of period	$ 13,566
Aggregate Intrinsic Value for Options Outstanding at period end	8,693	$ 13,566
Aggregate Intrinsic Value Options Outstanding at period end	$ 8,648
Stock Options
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Volatility rate	50.00%
Term	10 years
Stock price threshold term	10 days