Note 9 - Segment Information and Disaggregated Revenue (Details Textual)	3 Months Ended		6 Months Ended
	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Number of Reportable Segments			2
Revenue from Contract with Customer, Including Assessed Tax	$ 12,254,000	$ 14,594,000	$ 24,580,000	$ 27,345,000
Europe and Canada [Member]
Revenue from Contract with Customer, Including Assessed Tax	$ 1,914	$ 2,333	$ 2,473	$ 4,553