Note 12 - Operating Segments - Summarized Financial Information for Reportable Segments (Details) - USD ($)	1 Months Ended		3 Months Ended						9 Months Ended
	Mar. 31, 2022	Dec. 31, 2021	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Jun. 30, 2022	Jun. 30, 2021	Sep. 30, 2021
Revenue from Contract with Customer, Including Assessed Tax			$ 12,552,000			$ 13,562,000			$ 34,797,000	$ 37,952,000
Salaries and employee benefits			9,421,000			8,780,000			26,745,000	25,818,000
(Decrease) increase to the long-term supplemental compensation accrual			1,985,000			655,000			(65,000)	1,410,000
Others			3,249,000			2,803,000			9,791,000	8,410,000
Total operating expenses			14,655,000			12,238,000			36,471,000	35,638,000
Income (loss) from operations			(2,103,000)			1,324,000			(1,674,000)	2,314,000
Dividends and interest income			1,263,000			776,000			4,251,000	2,063,000
Gains on sale of land			272,000						272,000
Other income						69,000				69,000
Net realized gains on sales of marketable securities	$ 14,249,000	$ 14,249,000							14,249,000	18,478,000
Marketable Securities, Unrealized Gain (Loss)			(12,666,000)			55,686,000			(57,075,000)	131,754,000
Pretax income (loss)			(13,527,000)			57,773,000			(40,532,000)	154,434,000
Income tax benefits (provisions)			3,665,000			(15,200,000)			9,735,000	(40,115,000)
Net (loss) income			(9,862,000)	$ (27,813,000)	$ 6,878,000	42,573,000	$ 12,476,000	$ 59,270,000	(30,797,000)	114,319,000
Total assets			384,574,000			389,500,000			384,574,000	389,500,000	$ 390,577,000
Capital expenditures			11,000						14,000	29,000
Gains on sale of land			272,000						272,000
Real Estate Bank Loan Secured by Logan Office [Member]
(Decrease) increase to the long-term supplemental compensation accrual			1,985,000			655,000
Interest expense on debt			(12,000)			(14,000)			(38,000)	(48,000)
Margin Account [Member]
Interest expense on debt			(281,000)			(68,000)			(517,000)	(196,000)
Advertising [Member]
Revenue from Contract with Customer, Including Assessed Tax			1,989,000			2,195,000			5,679,000	5,649,000
Subscription and Circulation [Member]
Revenue from Contract with Customer, Including Assessed Tax			1,097,000			1,126,000			3,279,000	3,458,000
Advertising Service Fees and Other [Member]
Revenue from Contract with Customer, Including Assessed Tax			787,000			762,000			2,200,000	1,964,000
License and Maintenance [Member]
Revenue from Contract with Customer, Including Assessed Tax			4,633,000			5,602,000			13,721,000	16,990,000
Consulting Fees [Member]
Revenue from Contract with Customer, Including Assessed Tax			2,267,000			2,100,000			4,697,000	4,649,000
Service, Other [Member]
Revenue from Contract with Customer, Including Assessed Tax			1,779,000			1,777,000			5,221,000	5,242,000
Traditional Business [Member]
Revenue from Contract with Customer, Including Assessed Tax			3,873,000			4,083,000			11,158,000	11,071,000
Journal Technologies [Member]
Revenue from Contract with Customer, Including Assessed Tax			8,679,000			9,479,000			23,639,000	26,881,000
Operating Segments [Member] | Traditional Business [Member]
Revenue from Contract with Customer, Including Assessed Tax			3,873,000			4,083,000			11,158,000	11,071,000
Salaries and employee benefits			2,134,000			2,081,000			6,864,000	6,687,000
(Decrease) increase to the long-term supplemental compensation accrual									(25,000)	1,410,000
Others			904,000			929,000			2,877,000	2,904,000
Total operating expenses			5,023,000			3,665,000			9,716,000	11,001,000
Income (loss) from operations			(1,150,000)			418,000			1,442,000	70,000
Pretax income (loss)			(1,150,000)			418,000			1,442,000	70,000
Income tax benefits (provisions)			225,000			(175,000)			(335,000)	(15,000)
Net (loss) income			(925,000)			243,000			1,107,000	55,000
Total assets			22,091,000			17,894,000			22,091,000	17,894,000
Capital expenditures			4,000						4,000	22,000
Operating Segments [Member] | Traditional Business [Member] | Real Estate Bank Loan Secured by Logan Office [Member]
(Decrease) increase to the long-term supplemental compensation accrual			1,985,000
Operating Segments [Member] | Traditional Business [Member] | Advertising [Member]
Revenue from Contract with Customer, Including Assessed Tax			1,989,000			2,195,000			5,679,000	5,649,000
Operating Segments [Member] | Traditional Business [Member] | Subscription and Circulation [Member]
Revenue from Contract with Customer, Including Assessed Tax			1,097,000			1,126,000			3,279,000	3,458,000
Operating Segments [Member] | Traditional Business [Member] | Advertising Service Fees and Other [Member]
Revenue from Contract with Customer, Including Assessed Tax			787,000			762,000			2,200,000	1,964,000
Operating Segments [Member] | Journal Technologies [Member]
Revenue from Contract with Customer, Including Assessed Tax			8,679,000			9,479,000			23,639,000	26,881,000
Salaries and employee benefits			7,287,000			6,699,000			19,881,000	19,131,000
(Decrease) increase to the long-term supplemental compensation accrual									(40,000)
Others			2,345,000			1,874,000			6,914,000	5,506,000
Total operating expenses			9,632,000			8,573,000			26,755,000	24,637,000
Income (loss) from operations			(953,000)			906,000			(3,116,000)	2,244,000
Pretax income (loss)			(953,000)			906,000			(3,116,000)	2,244,000
Income tax benefits (provisions)			280,000			(460,000)			985,000	(785,000)
Net (loss) income			(673,000)			446,000			(2,131,000)	1,459,000
Total assets			20,814,000			21,498,000			20,814,000	21,498,000
Capital expenditures			7,000						10,000	7,000
Operating Segments [Member] | Journal Technologies [Member] | Real Estate Bank Loan Secured by Logan Office [Member]
(Decrease) increase to the long-term supplemental compensation accrual						655,000
Operating Segments [Member] | Journal Technologies [Member] | License and Maintenance [Member]
Revenue from Contract with Customer, Including Assessed Tax			4,633,000			5,602,000			13,721,000	16,990,000
Operating Segments [Member] | Journal Technologies [Member] | Consulting Fees [Member]
Revenue from Contract with Customer, Including Assessed Tax			2,267,000			2,100,000			4,697,000	4,649,000
Operating Segments [Member] | Journal Technologies [Member] | Service, Other [Member]
Revenue from Contract with Customer, Including Assessed Tax			1,779,000			1,777,000			5,221,000	5,242,000
Corporate, Non-Segment [Member]
Dividends and interest income			1,263,000			776,000			4,251,000	2,063,000
Gains on sale of land			272,000						272,000
Other income						69,000				69,000
Net realized gains on sales of marketable securities									14,249,000	18,478,000
Marketable Securities, Unrealized Gain (Loss)			(12,666,000)			55,686,000			(57,075,000)	131,754,000
Pretax income (loss)			(11,424,000)			56,449,000			(38,858,000)	152,120,000
Income tax benefits (provisions)			3,160,000			(14,565,000)			9,085,000	(39,315,000)
Net (loss) income			(8,264,000)			41,884,000			(29,773,000)	112,805,000
Total assets			341,669,000			350,108,000			341,669,000	350,108,000
Gains on sale of land			272,000						272,000
Corporate, Non-Segment [Member] | Real Estate Bank Loan Secured by Logan Office [Member]
Interest expense on debt			(12,000)			(14,000)			(38,000)	(48,000)
Corporate, Non-Segment [Member] | Margin Account [Member]
Interest expense on debt			$ (281,000)			$ (68,000)			$ (517,000)	$ (196,000)