Condensed Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive (Loss)Income [Member]	Retained Earnings [Member]
Beginning balance at Sep. 30, 2020	$ 131,055	$ 684	$ 15,369	$ 3,174	$ 111,828
Beginning balance, shares at Sep. 30, 2020		13,672
Net (loss) income	4,526				4,526
Other comprehensive income (loss), net of tax	585			585
Issuance of common stock	297	$ 5	292
Issuance of common stock ,shares		91
Common stock options exercised, net	2,330	$ 6	2,324
Common stock option exercise ,shares		127
Purchase of common stock to pay employee taxes	(2,279)	$ (1)	(2,278)
Purchase of common stock to pay employee taxes ,shares		(18)
Stock-based compensation	4,318		4,318
Ending balance at Jun. 30, 2021	140,832	$ 694	20,025	3,759	116,354
Ending balance ,shares at Jun. 30, 2021		13,872
Beginning balance at Mar. 31, 2021	142,081	$ 693	18,516	3,231	119,641
Beginning balance, shares at Mar. 31, 2021		13,868
Net (loss) income	(3,287)				(3,287)
Other comprehensive income (loss), net of tax	528			528
Issuance of common stock	1	$ 1
Issuance of common stock ,shares		2
Common stock options exercised, net	90		90
Common stock option exercise ,shares		2
Purchase of common stock to pay employee taxes	(37)		(37)
Stock-based compensation	1,456		1,456
Ending balance at Jun. 30, 2021	140,832	$ 694	20,025	3,759	116,354
Ending balance ,shares at Jun. 30, 2021		13,872
Beginning balance at Sep. 30, 2021	140,085	$ 695	21,598	1,727	116,065
Beginning balance, shares at Sep. 30, 2021		13,899
Net (loss) income	(12,546)				(12,546)
Other comprehensive income (loss), net of tax	(7,446)			(7,446)
Issuance of common stock	372	$ 5	367
Issuance of common stock ,shares		100
Common stock options exercised, net	391	$ 1	390
Common stock option exercise ,shares		21
Purchase of common stock to pay employee taxes	(942)	$ (1)	(941)
Purchase of common stock to pay employee taxes ,shares		(21)
Stock-based compensation	5,198		5,198
Ending balance at Jun. 30, 2022	125,112	$ 700	26,612	(5,719)	103,519
Ending balance ,shares at Jun. 30, 2022		13,999
Beginning balance at Mar. 31, 2022	133,263	$ 700	24,827	(1,434)	109,170
Beginning balance, shares at Mar. 31, 2022		13,990
Net (loss) income	(5,651)				(5,651)
Other comprehensive income (loss), net of tax	(4,285)			(4,285)
Issuance of common stock ,shares		9
Common stock options exercised, net	22		22
Common stock option exercise ,shares		1
Purchase of common stock to pay employee taxes	(36)		(36)
Purchase of common stock to pay employee taxes ,shares		(1)
Stock-based compensation	1,799		1,799
Ending balance at Jun. 30, 2022	$ 125,112	$ 700	$ 26,612	$ (5,719)	$ 103,519
Ending balance ,shares at Jun. 30, 2022		13,999