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)		169,000
Exercise of stock options	1,048		1,048
Settlement of restricted stock units (in shares)		898,000
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	10,901		10,901
Repurchases and retirement of common stock (in shares)		(820,000)
Repurchases and retirement of common stock	(10,040)	$ (1)			(10,039)
Components of comprehensive income (loss), net of tax:
Net income (loss)	(5,295)				(5,295)
Currency translation adjustment	4,270			4,270
Change in unrealized gain (loss) on investments	93			93
Ending balance (in shares) at Jun. 30, 2024		46,149,000
Ending balance at Jun. 30, 2024	209,636	$ 46	244,110	(9,874)	(24,646)
Beginning balance (in shares) at Mar. 31, 2024		46,791,000
Beginning balance at Mar. 31, 2024	216,146	$ 47	240,521	(9,599)	(14,823)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options (in shares)		2,000
Exercise of stock options	4		4
Settlement of restricted stock units (in shares)		176,000
Settlement of restricted stock units	0
Stock-based compensation expense	3,585		3,585
Repurchases and retirement of common stock (in shares)		(820,000)
Repurchases and retirement of common stock	(10,040)	$ (1)			(10,039)
Components of comprehensive income (loss), net of tax:
Net income (loss)	216				216
Currency translation adjustment	(307)			(307)
Change in unrealized gain (loss) on investments	32			32
Ending balance (in shares) at Jun. 30, 2024		46,149,000
Ending balance at Jun. 30, 2024	$ 209,636	$ 46	244,110	(9,874)	(24,646)
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)	116,827	117,000
Exercise of stock options	$ 529		529
Settlement of restricted stock units (in shares)		781,000
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	13,239		13,239
Repurchases and retirement of common stock (in shares)		(370,000)
Repurchases and retirement of common stock	(3,259)	$ (1)			(3,258)
Components of comprehensive income (loss), net of tax:
Net income (loss)	6,936				6,936
Currency translation adjustment	4,734			4,734
Change in unrealized gain (loss) on investments	$ (92)			(92)
Ending balance (in shares) at Jun. 30, 2025	45,621,504	45,622,000
Ending balance at Jun. 30, 2025	$ 237,592	$ 46	261,796	2,340	(26,590)
Beginning balance (in shares) at Mar. 31, 2025		45,531,000
Beginning balance at Mar. 31, 2025	220,214	$ 46	257,106	(7,952)	(28,986)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options (in shares)		1,000
Exercise of stock options	268		268
Settlement of restricted stock units (in shares)		90,000
Settlement of restricted stock units	0
Stock-based compensation expense	4,422		4,422
Components of comprehensive income (loss), net of tax:
Net income (loss)	2,396				2,396
Currency translation adjustment	10,300			10,300
Change in unrealized gain (loss) on investments	$ (8)			(8)
Ending balance (in shares) at Jun. 30, 2025	45,621,504	45,622,000
Ending balance at Jun. 30, 2025	$ 237,592	$ 46	$ 261,796	$ 2,340	$ (26,590)