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						9 Months Ended
	Mar. 31, 2024	Dec. 31, 2023	Sep. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Mar. 31, 2024	Mar. 31, 2023
Net loss	$ (3,154)	$ (2,641)	$ (2,912)	$ (2,375)	$ (2,418)	$ (2,529)	$ (8,707)	$ (7,322)
Denominator for basic and diluted net loss per share — weighted average common stock outstanding (in shares)	1,633			1,616			1,632	1,614
Net loss per common share (in dollars per share)	$ (1.93)			$ (1.47)			$ (5.34)	$ (4.54)