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, 2022	Sep. 30, 2022	Dec. 31, 2021	Sep. 30, 2021	Dec. 31, 2022	Dec. 31, 2021
Net loss	$ (2,418)	$ (2,529)	$ (2,180)	$ (2,029)	$ (4,947)	$ (4,209)
Denominator for basic and diluted net loss per share — weighted average common stock outstanding (in shares)	1,613		1,583		1,613	1,582
Net loss per common share (in dollars per share)	$ (1.50)		$ (1.38)		$ (3.07)	$ (2.66)