Stockholders' Equity (Details) - USD ($)	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023	Nov. 14, 2025	Apr. 30, 2025	May 31, 2022
Share Repurchase Program [Line Items]
Preferred stock outstanding (in shares)	0
Common stock authorized (in shares)	63,000,000	63,000,000
Common stock issued (in shares)	29,762,293	31,047,510
Common stock outstanding (in shares)	29,762,293	31,047,510
Authorized amount repurchase of common stock					$ 100,000,000	$ 50,000,000
Remaining availability repurchase amount	$ 87,500,000					$ 8,300,000
Share repurchases (in shares)	1,500,000	455,000	0
Aggregate repurchased value	$ 33,077,000	$ 12,929,000
Shares repurchased, average price per share (in usd per share)	$ 22.20	$ 28.41
Dividends paid	$ 0	$ 0	$ 0
Net deferred tax assets	$ 142,647,000	128,525,000
Increase in net deferred tax assets	11.00%
Federal and state net operating loss and tax credit carryforwards	$ 140,962,000	126,547,000
Federal tax authority
Share Repurchase Program [Line Items]
Federal and state net operating loss and tax credit carryforwards	84,100,000
Subsequent Event
Share Repurchase Program [Line Items]
Rights Agreement limitation				4.95%
Paid-in Capital
Share Repurchase Program [Line Items]
Aggregate repurchased value	$ 33,076,000	$ 12,928,000