CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit
Beginning balance (in shares) at Sep. 30, 2024		44,999,000
Beginning balance at Sep. 30, 2024	$ 214,801	$ 45	$ 247,326	$ (2,302)	$ (30,268)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options (in shares)		66,000
Exercise of stock options	177		177
Settlement of restricted stock units (in shares)		517,000
Settlement of restricted stock units	0	$ 1	(1)
Stock-based compensation expense	4,465		4,465
Repurchases and retirement of common stock (in shares)		(370,000)
Repurchases and retirement of common stock	(3,266)	$ (1)			(3,265)
Components of comprehensive income (loss), net of tax:
Net income (loss)	(4,612)				(4,612)
Currency translation adjustment	(10,510)			(10,510)
Change in unrealized gain (loss) on investments	(138)			(138)
Ending balance (in shares) at Dec. 31, 2024		45,212,000
Ending balance at Dec. 31, 2024	$ 200,917	$ 45	251,967	(12,950)	(38,145)
Beginning balance (in shares) at Sep. 30, 2025	44,998,939	45,637,000
Beginning balance at Sep. 30, 2025	$ 240,258	$ 46	265,835	586	(26,209)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options (in shares)	5,200	5,000
Exercise of stock options	$ 25		25
Settlement of restricted stock units (in shares)		719,000
Settlement of restricted stock units	0
Payment of tax withholding obligations related to net share settlements of equity awards	(1,983)		(1,983)
Stock-based compensation expense	2,691		2,691
Repurchases and retirement of common stock (in shares)		(1,078,000)
Repurchases and retirement of common stock	(9,995)	$ (1)			(9,994)
Components of comprehensive income (loss), net of tax:
Net income (loss)	2,772				2,772
Currency translation adjustment	(89)			(89)
Change in unrealized gain (loss) on investments	$ (23)			(23)
Ending balance (in shares) at Dec. 31, 2025	45,282,535	45,283,000
Ending balance at Dec. 31, 2025	$ 233,656	$ 45	$ 266,568	$ 474	$ (33,431)