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, 2022		44,680,000
Beginning balance at Sep. 30, 2022	$ 170,979	$ 44	$ 216,493	$ (28,219)	$ (17,339)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options (in shares)		99,000
Exercise of stock options	676		676
Settlement of restricted stock units (in shares)		656,000
Settlement of restricted stock units	56	$ 1	55
Issuance of common stock under employee stock purchase plan (in shares)		72,000
Issuance of common stock under employee stock purchase plan	619		619
Stock-based compensation expense	7,790		7,790
Components of comprehensive income (loss), net of tax:
Net income (loss)	9,471				9,471
Currency translation adjustment	17,944			17,944
Change in unrealized gain (loss) on investments	771			771
Ending balance (in shares) at Jun. 30, 2023		45,507,000
Ending balance at Jun. 30, 2023	208,306	$ 45	225,633	(9,504)	(7,868)
Beginning balance (in shares) at Mar. 31, 2023		45,410,000
Beginning balance at Mar. 31, 2023	203,692	$ 45	222,933	(11,846)	(7,440)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options (in shares)		13,000
Exercise of stock options	56		56
Settlement of restricted stock units (in shares)		84,000
Settlement of restricted stock units	0
Stock-based compensation expense	2,644		2,644
Components of comprehensive income (loss), net of tax:
Net income (loss)	(428)				(428)
Currency translation adjustment	2,219			2,219
Change in unrealized gain (loss) on investments	123			123
Ending balance (in shares) at Jun. 30, 2023		45,507,000
Ending balance at Jun. 30, 2023	$ 208,306	$ 45	225,633	(9,504)	(7,868)
Beginning balance (in shares) at Sep. 30, 2023	45,591,199	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)	168,434	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 retirements 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	46,148,999	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 retirements 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	46,148,999	46,149,000
Ending balance at Jun. 30, 2024	$ 209,636	$ 46	$ 244,110	$ (9,874)	$ (24,646)