Consolidated Statements of Income and Comprehensive Income (Unaudited) - USD ($)	3 Months Ended		6 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023
Revenues [Abstract]
Revenues	$ 16,571,000	$ 16,154,000	$ 32,564,000	$ 28,455,000
Costs and expenses
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)
Agency commissions	299,000	233,000	542,000	444,000
Outside services	1,583,000	1,749,000	3,250,000	2,979,000
Postage and delivery expenses	183,000	167,000	359,000	334,000
Newsprint and printing expenses	160,000	193,000	365,000	392,000
Depreciation and amortization	67,000	70,000	133,000	145,000
Equipment maintenance and software	336,000	354,000	712,000	657,000
Credit card merchant discount fees	558,000	455,000	1,110,000	880,000
Rent expenses	71,000	74,000	141,000	143,000
Accounting and legal fees	155,000	222,000	411,000	495,000
Other general and administrative expenses	925,000	1,065,000	1,757,000	2,019,000
Operating Expenses	15,938,000	14,529,000	31,308,000	27,546,000
Income from operations	633,000	1,625,000	1,256,000	909,000
Other income (expense)
Dividends and interest income	1,289,000	4,063,000	2,858,000	5,132,000
Realized gains on sales of marketable securities	14,261,000	0	14,261,000	422,000
Net unrealized gains on marketable securities	5,503,000	8,644,000	20,193,000	32,669,000
Income before income taxes	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	$ 15,415,000	$ 9,433,000	$ 28,030,000	$ 27,260,000
Weighted average number of common shares outstanding - basic and diluted (in shares)	1,377,026	1,377,026	1,377,026	1,377,026
Basic and diluted net income per share (in dollars per share)	$ 11.19	$ 6.85	$ 20.36	$ 19.8
Comprehensive income	$ 15,415,000	$ 9,433,000	$ 28,030,000	$ 27,260
Revenues	16,571,000	16,154,000	32,564,000	28,455,000
Margin Account [Member]
Other income (expense)
Interest expense on margin loans and others	(1,056,000)	(1,052,000)	(2,187,000)	(1,913,000)
Real Estate Bank Loan Secured by Logan Office [Member]
Other income (expense)
Interest expense on margin loans and others	(10,000)	(12,000)	(21,000)	(24,000)
Advertising [Member]
Revenues [Abstract]
Revenues	2,316,000	2,204,000	4,403,000	4,194,000
Other income (expense)
Revenues	2,316,000	2,204,000	4,403,000	4,194,000
Subscription and Circulation [Member]
Revenues [Abstract]
Revenues	1,099,000	1,108,000	2,194,000	2,206,000
Other income (expense)
Revenues	1,099,000	1,108,000	2,194,000	2,206,000
Advertising Service Fees and Other [Member]
Revenues [Abstract]
Revenues	697,000	778,000	1,402,000	1,477,000
Other income (expense)
Revenues	697,000	778,000	1,402,000	1,477,000
License and Maintenance [Member]
Revenues [Abstract]
Revenues	6,854,000	5,679,000	13,411,000	10,074,000
Other income (expense)
Revenues	6,854,000	5,679,000	13,411,000	10,074,000
Consulting Fees [Member]
Revenues [Abstract]
Revenues	3,199,000	4,433,000	6,501,000	6,755,000
Other income (expense)
Revenues	3,199,000	4,433,000	6,501,000	6,755,000
Service, Other [Member]
Revenues [Abstract]
Revenues	2,406,000	1,952,000	4,653,000	3,749,000
Other income (expense)
Revenues	$ 2,406,000	$ 1,952,000	$ 4,653,000	$ 3,749,000