Note 12 - Equity Incentive Plan - Stock-based Compensation Expense (Details) - Selling, General and Administrative Expenses [Member] - USD ($)	3 Months Ended		6 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Total stock-based compensation expense	$ 508,000	$ 162,000	$ 963,000	$ 327,000
Share-based Payment Arrangement, Option [Member]
Total stock-based compensation expense	94,000	2,000	166,000	7,000
Restricted Stock [Member]
Total stock-based compensation expense	$ 414,000	$ 160,000	$ 797,000	$ 320,000