Note 12 - Operating Segments - Summarized Financial Information for Reportable Segments (Details) - USD ($)	1 Months Ended	3 Months Ended				6 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2024	Mar. 31, 2023	Sep. 30, 2023
Revenues		$ 16,571,000		$ 16,154,000		$ 32,564,000	$ 28,455,000
Salaries and employee benefits		12,011,000		10,147,000		23,358,000	19,778,000
Decrease to the long-term supplemental compensation accrual		(410,000)		(200,000)		(830,000)	(720,000)
Other public service fees		4,337,000		4,582,000		8,780,000	8,488,000
Total operating revenues		15,938,000		14,529,000		31,308,000	27,546,000
Income (loss) from operations		633,000		1,625,000		1,256,000	909,000
Dividends and interest income		1,289,000		4,063,000		2,858,000	5,132,000
Marketable Security, Realized Gain (Loss)	$ 14,261,000	14,261,000				14,261,000	422,000
Marketable Security, Unrealized Gain (Loss)		5,503,000		8,644,000		20,193,000	32,669,000	$ 32,669,000
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest		20,620,000		13,268,000		36,360,000	37,195,000
Income tax provisions		(5,205,000)		(3,835,000)		(8,330,000)	(9,935,000)
Net income (loss)		15,415,000	$ 12,615,000	9,433,000	$ 17,827,000	28,030,000	27,260,000
Total assets	335,747,000	335,747,000		359,020,000		335,747,000	359,020,000	$ 354,860,000
Payments to Acquire Property, Plant, and Equipment		18,000		38,000		23,000	74,000
Real Estate Bank Loan Secured by Logan Office [Member]
Interest expenses on note payable collateralized by real estate		(10,000)		(12,000)		(21,000)	(24,000)
Margin Account [Member]
Interest expenses on note payable collateralized by real estate		(1,056,000)		(1,052,000)		(2,187,000)	(1,913,000)
Traditional Business [Member]
Revenues		4,112,000		4,090,000		7,999,000	7,877,000
Journal Technologies [Member]
Revenues		12,459,000		12,064,000		24,565,000	20,578,000
Operating Segments [Member] | Traditional Business [Member]
Revenues		4,112,000		4,090,000		7,999,000	7,877,000
Salaries and employee benefits		2,624,000		2,281,000		5,173,000	4,499,000
Decrease to the long-term supplemental compensation accrual		(380,000)		(200,000)		(800,000)	(700,000)
Other public service fees		1,294,000		1,301,000		2,765,000	2,435,000
Total operating revenues		3,538,000		3,382,000		7,138,000	6,234,000
Income (loss) from operations		574,000		708,000		861,000	1,643,000
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest		574,000		708,000		861,000	1,643,000
Income tax provisions		(145,000)		(200,000)		(200,000)	(435,000)
Net income (loss)		429,000		508,000		661,000	1,208,000
Total assets	14,807,000	14,807,000		14,053,000		14,807,000	14,053,000
Payments to Acquire Property, Plant, and Equipment		18,000		38,000		23,000	70,000
Operating Segments [Member] | Journal Technologies [Member]
Revenues		12,459,000		12,064,000		24,565,000	20,578,000
Salaries and employee benefits		9,387,000		7,866,000		18,185,000	15,279,000
Decrease to the long-term supplemental compensation accrual		(30,000)				(30,000)	(20,000)
Other public service fees		3,043,000		3,281,000		6,015,000	6,053,000
Total operating revenues		12,400,000		11,147,000		24,170,000	21,312,000
Income (loss) from operations		59,000		917,000		395,000	(734,000)
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest		59,000		917,000		395,000	(734,000)
Income tax provisions		160,000		(215,000)		(90,000)	135,000
Net income (loss)		219,000		702,000		305,000	(599,000)
Total assets	23,937,000	23,937,000		25,444,000		23,937,000	25,444,000
Payments to Acquire Property, Plant, and Equipment							4,000
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member]
Dividends and interest income		1,289,000		4,063,000		2,858,000	5,132,000
Marketable Security, Realized Gain (Loss)		14,261,000				14,261,000	422,000
Marketable Security, Unrealized Gain (Loss)		5,503,000		8,644,000		20,193,000	32,669,000
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest		19,987,000		11,643,000		35,104,000	36,286,000
Income tax provisions		(5,220,000)		(3,420,000)		(8,040,000)	(9,635,000)
Net income (loss)		14,767,000		8,223,000		27,064,000	26,651,000
Total assets	$ 297,003,000	297,003,000		319,523,000		297,003,000	319,523,000
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] | Real Estate Bank Loan Secured by Logan Office [Member]
Interest expenses on note payable collateralized by real estate		(10,000)		(12,000)		(21,000)	(24,000)
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] | Margin Account [Member]
Interest expenses on note payable collateralized by real estate		(1,056,000)		(1,052,000)		(2,187,000)	(1,913,000)
Advertising [Member]
Revenues		2,316,000		2,204,000		4,403,000	4,194,000
Advertising [Member] | Operating Segments [Member] | Traditional Business [Member]
Revenues		2,316,000		2,204,000		4,403,000	4,194,000
Subscription and Circulation [Member]
Revenues		1,099,000		1,108,000		2,194,000	2,206,000
Subscription and Circulation [Member] | Operating Segments [Member] | Traditional Business [Member]
Revenues		1,099,000		1,108,000		2,194,000	2,206,000
Advertising Service Fees and Other [Member]
Revenues		697,000		778,000		1,402,000	1,477,000
Advertising Service Fees and Other [Member] | Operating Segments [Member] | Traditional Business [Member]
Revenues		697,000		778,000		1,402,000	1,477,000
License and Maintenance [Member]
Revenues		6,854,000		5,679,000		13,411,000	10,074,000
License and Maintenance [Member] | Operating Segments [Member] | Journal Technologies [Member]
Revenues		6,854,000		5,679,000		13,411,000	10,074,000
Consulting Fees [Member]
Revenues		3,199,000		4,433,000		6,501,000	6,755,000
Consulting Fees [Member] | Operating Segments [Member] | Journal Technologies [Member]
Revenues		3,199,000		4,433,000		6,501,000	6,755,000
Service, Other [Member]
Revenues		2,406,000		1,952,000		4,653,000	3,749,000
Service, Other [Member] | Operating Segments [Member] | Journal Technologies [Member]
Revenues		$ 2,406,000		$ 1,952,000		$ 4,653,000	$ 3,749,000