Note 11 - Financial Information by Business Segment - Total Revenues and Income by Business Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022	Jun. 30, 2022
Statement [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	$ 3,624	$ 6,175	$ 11,764	$ 19,270
Investment Income, Net	1,155	(3,495)	(189)	(1,950)
Other income	61	59	184	174
Income (loss) before income taxes	1,946	(1,092)	3,218	6,341
Depreciation	61	61	183	165
Gross identifiable assets	54,086		54,086
Deferred tax asset	1,659		1,659		$ 872
Consolidated total assets	55,745	62,515	55,745	62,515	$ 58,362
Investment loss	1,155	(3,495)	(189)	(1,950)
Income (Loss) from Equity Method Investments	0	(173)	0	(206)
Investment Management Services [Member]
Statement [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	3,624	6,175	11,764	19,270
Investment Income, Net	0	0	0	0
Other income	61	59	184	174
Income (loss) before income taxes	815	2,612	3,461	8,750
Depreciation	61	61	183	165
Gross identifiable assets	25,056		25,056
Deferred tax asset
Consolidated total assets		27,652		27,652
Investment loss	0	0	0	0
Income (Loss) from Equity Method Investments		0		0
Corporate Investments [Member]
Statement [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	0	0	0	0
Investment Income, Net	1,155	(3,495)	(189)	(1,950)
Other income	0	0	0	0
Income (loss) before income taxes	1,131	(3,704)	(243)	(2,409)
Depreciation	0	0	0	0
Gross identifiable assets	29,030		29,030
Deferred tax asset
Consolidated total assets		34,863		34,863
Investment loss	$ 1,155	(3,495)	$ (189)	(1,950)
Income (Loss) from Equity Method Investments		$ (173)		$ (206)