Note 15 - Equity Incentive Plans - Stock Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022
Total stock-based compensation expense	$ 820	$ 3,067	$ 1,750	$ 4,244
Cost of Sales [Member]
Total stock-based compensation expense	1	3	1	8
Research and Development Expense [Member]
Total stock-based compensation expense	2	14	3	23
Selling and Marketing Expense [Member]
Total stock-based compensation expense	0	3	0	6
General and Administrative Expense [Member]
Total stock-based compensation expense	$ 817	$ 3,047	$ 1,746	$ 4,207