Condensed Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive 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	(274)				(274)
Other comprehensive loss, net of tax	1,832			1,832
Issuance of common stock		$ 4	(4)
Issuance of common stock, shares		81
Common stock options exercised, net	6		6
Common stock options exercised, net, shares		3
Purchase of common stock to pay employee taxes	(645)	$ (1)	(644)
Purchase of common stock to pay employee taxes, shares		(17)
Stock-based compensation	1,433		1,433
Ending balance at Dec. 31, 2020	133,407	$ 687	16,160	5,006	111,554
Ending balance, shares at Dec. 31, 2020		13,739
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	(2,812)				(2,812)
Other comprehensive loss, net of tax	(1,652)			(1,652)
Issuance of common stock		$ 4	(4)
Issuance of common stock, shares		81
Common stock options exercised, net	230	$ 1	229
Common stock options exercised, net, shares		14
Purchase of common stock to pay employee taxes	(860)	$ (1)	(859)
Purchase of common stock to pay employee taxes, shares		(19)
Stock-based compensation	1,680		1,680
Ending balance at Dec. 31, 2021	$ 136,671	$ 699	$ 22,644	$ 75	$ 113,253
Ending balance, shares at Dec. 31, 2021		13,975