Note 12 - Financial Information by Business Segment - Total Revenues and Income by Business Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Jun. 30, 2023
Revenue from Contract with Customer, Including Assessed Tax	$ 2,818	$ 3,728	$ 5,951	$ 8,140
Net investment income (loss)	1,416	116	903	(1,344)
Other income (loss)	57	62	115	123
Income (loss) before income taxes	1,665	1,086	1,424	1,272
Depreciation	62	61	123	122
Gross identifiable assets	51,502	53,342	51,502	53,342
Deferred tax asset	2,130	1,609	2,130	1,609	$ 1,920
Consolidated total assets	53,632	54,951	53,632	54,951	$ 55,673
Investment Management Services [Member]
Revenue from Contract with Customer, Including Assessed Tax	2,818	3,728	5,951	8,140
Net investment income (loss)	0	0	0	0
Other income (loss)	57	62	115	123
Income (loss) before income taxes	266	985	553	2,646
Depreciation	62	61	123	122
Gross identifiable assets	27,417	23,952	27,417	23,952
Corporate Investments [Member]
Revenue from Contract with Customer, Including Assessed Tax	0	0	0	0
Net investment income (loss)	1,416	116	903	(1,344)
Other income (loss)	0	0	0	0
Income (loss) before income taxes	1,399	101	871	(1,374)
Depreciation	0	0	0	0
Gross identifiable assets	$ 24,085	$ 29,390	$ 24,085	$ 29,390