Summary of Significant Accounting Policies - Dilutive Effect (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Accounting Policies [Abstract]
Net loss	$ (8,692)	$ (9,640)
Weighted-average common shares outstanding (basic) (in shares)	5,929	5,830
Weighted-average common shares outstanding (diluted) (in shares)	5,929	5,830
Net loss per share – basic (in dollars per share)	$ (1.47)	$ (1.65)
Net loss per share – diluted (in dollars per share)	$ (1.47)	$ (1.65)
Anti-dilutive weighted-average common shares excluded from calculation of diluted earnings per share (in shares)	202	270