Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income (Loss) [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		13,672,000
Net income (loss)	4,237				4,237
Other comprehensive income (loss)	(1,447)			(1,447)
Issuance of common stock	619	$ 5	614
Issuance of common stock, shares		100,000
Common stock options exercised, net	$ 2,509	$ 7	2,502
Common stock options exercised, net, shares	248,000	146,000
Purchase of common stock to pay employee taxes	$ (2,751)	$ (1)	(2,750)
Purchase of common stock to pay employee taxes, shares		(19,000)
Stock-based compensation	5,863		5,863
Ending balance at Sep. 30, 2021	140,085	$ 695	21,598	1,727	116,065
Ending balance, shares at Sep. 30, 2021		13,899,000
Net income (loss)	(27,274)				(27,274)
Other comprehensive income (loss)	(11,601)			(11,601)
Issuance of common stock	832	$ 6	826
Issuance of common stock, shares		124,000
Common stock options exercised, net	$ 414	$ 1	413
Common stock options exercised, net, shares	45,000	27,000
Purchase of common stock to pay employee taxes	$ (1,121)	$ (1)	(1,120)
Purchase of common stock to pay employee taxes, shares		(21,000)
Stock-based compensation	7,057		7,057
Ending balance at Sep. 30, 2022	108,392	$ 701	28,774	(9,874)	88,791
Ending balance, shares at Sep. 30, 2022		14,029,000
Net income (loss)	(1,536)				(1,536)
Other comprehensive income (loss)	5,115			5,115
Issuance of common stock	850	$ 7	843
Issuance of common stock, shares		133,000
Common stock options exercised, net	$ 402	$ 1	401
Common stock options exercised, net, shares	20,000	19,000
Purchase of common stock to pay employee taxes	$ (918)	$ (1)	(917)
Purchase of common stock to pay employee taxes, shares		(26,000)
Stock-based compensation	7,605		7,605
Ending balance at Sep. 30, 2023	$ 119,910	$ 708	$ 36,706	$ (4,759)	$ 87,255
Ending balance, shares at Sep. 30, 2023		14,155,000