Note 6 - Net Loss Per Share - Schedule of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended				6 Months Ended
	Dec. 31, 2023	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022	Dec. 31, 2023	Dec. 31, 2022
Net loss	$ (2,641)	$ (2,912)	$ (2,418)	$ (2,529)	$ (5,553)	$ (4,947)
Denominator for basic and diluted net loss per share — weighted average common stock outstanding (in shares)	1,631		1,613		1,631	1,613
Net loss per common share (in dollars per share)	$ (1.62)		$ (1.5)		$ (3.4)	$ (3.07)