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, 2023		45,591,000
Beginning balance at Sep. 30, 2023	$ 205,188	$ 46	$ 228,691	$ (14,237)	$ (9,312)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options (in shares)		167,000
Exercise of stock options	1,042		1,042
Settlement of restricted stock units (in shares)		722,000
Settlement of restricted stock units	0	$ 1	(1)
Acquisition-related shares issued (in shares)		311,000
Acquisition-related shares issued	3,471		3,471
Stock-based compensation expense	7,318		7,318
Components of comprehensive income (loss), net of tax:
Net income (loss)	(5,511)				(5,511)
Currency translation adjustment	4,578			4,578
Change in unrealized gain (loss) on investments	60			60
Ending balance (in shares) at Mar. 31, 2024		46,791,000
Ending balance at Mar. 31, 2024	216,146	$ 47	240,521	(9,599)	(14,823)
Beginning balance (in shares) at Dec. 31, 2023		46,632,000
Beginning balance at Dec. 31, 2023	213,798	$ 47	236,447	(7,591)	(15,105)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options (in shares)		71,000
Exercise of stock options	186		186
Settlement of restricted stock units (in shares)		88,000
Settlement of restricted stock units	0
Stock-based compensation expense	3,888		3,888
Components of comprehensive income (loss), net of tax:
Net income (loss)	282				282
Currency translation adjustment	(1,966)			(1,966)
Change in unrealized gain (loss) on investments	(42)			(42)
Ending balance (in shares) at Mar. 31, 2024		46,791,000
Ending balance at Mar. 31, 2024	$ 216,146	$ 47	240,521	(9,599)	(14,823)
Beginning balance (in shares) at Sep. 30, 2024	44,998,939	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)	115,827	116,000
Exercise of stock options	$ 261		261
Settlement of restricted stock units (in shares)		691,000
Settlement of restricted stock units	0	$ 2	(2)
Issuance of common stock under employee stock purchase plan (in shares)		95,000
Issuance of common stock under employee stock purchase plan	704		704
Stock-based compensation expense	8,817		8,817
Repurchases and retirement of common stock (in shares)		(370,000)
Repurchases and retirements of common stock	(3,259)	$ (1)			(3,258)
Components of comprehensive income (loss), net of tax:
Net income (loss)	4,540				4,540
Currency translation adjustment	(5,566)			(5,566)
Change in unrealized gain (loss) on investments	$ (84)			(84)
Ending balance (in shares) at Mar. 31, 2025	45,530,911	45,531,000
Ending balance at Mar. 31, 2025	$ 220,214	$ 46	257,106	(7,952)	(28,986)
Beginning balance (in shares) at Dec. 31, 2024		45,212,000
Beginning balance at Dec. 31, 2024	200,917	$ 45	251,967	(12,950)	(38,145)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options (in shares)		50,000
Exercise of stock options	84		84
Settlement of restricted stock units (in shares)		174,000
Settlement of restricted stock units	0	$ 1	(1)
Issuance of common stock under employee stock purchase plan (in shares)		95,000
Issuance of common stock under employee stock purchase plan	704		704
Stock-based compensation expense	4,352		4,352
Repurchases and retirements of common stock	7				7
Components of comprehensive income (loss), net of tax:
Net income (loss)	9,152				9,152
Currency translation adjustment	4,944			4,944
Change in unrealized gain (loss) on investments	$ 54			54
Ending balance (in shares) at Mar. 31, 2025	45,530,911	45,531,000
Ending balance at Mar. 31, 2025	$ 220,214	$ 46	$ 257,106	$ (7,952)	$ (28,986)