Note 11 - Financial Information by Business Segment - Total Revenues and Income by Business Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Jun. 30, 2022
Revenue from Contract with Customer, Including Assessed Tax	$ 3,728	$ 6,574	$ 8,140	$ 13,095
Investment Income, Net, Total	116	1,579	(1,344)	1,545
Other income	62	59	123	115
Income (loss) before income taxes	1,086	4,529	1,272	7,433
Depreciation	61	56	122	104
Gross identifiable assets	53,342		53,342
Deferred tax asset	1,609		1,609		$ 872
Consolidated total assets	54,951	64,191	54,951	64,191	$ 58,362
Income (Loss) from Equity Method Investments	0	(48)	0	(33)
Investment Management Services [Member]
Revenue from Contract with Customer, Including Assessed Tax	3,728	6,574	8,140	13,095
Investment Income, Net, Total	0	0	0	0
Other income	62	59	123	115
Income (loss) before income taxes	985	3,025	2,646	6,138
Depreciation	61	56	122	104
Gross identifiable assets	23,952		23,952
Deferred tax asset
Consolidated total assets		23,386		23,386
Income (Loss) from Equity Method Investments		0		0
Corporate Investments [Member]
Revenue from Contract with Customer, Including Assessed Tax	0	0	0	0
Investment Income, Net, Total	116	1,579	(1,344)	1,545
Other income	0	0	0	0
Income (loss) before income taxes	101	1,504	(1,374)	1,295
Depreciation	0	0	0	0
Gross identifiable assets	29,390		29,390
Deferred tax asset
Consolidated total assets		40,805		40,805
Income (Loss) from Equity Method Investments		$ (48)		$ (33)