Consolidated Statements of Income and Comprehensive Income (Unaudited) - USD ($)	3 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Revenue from Contract with Customer, Including Assessed Tax	$ 12,301,000	$ 11,736,000
Costs and expenses
Salaries and employee benefits	9,631,000	8,477,000
Decrease to the long-term supplemental compensation accrual	(520,000)	(130,000)
Agency commissions	211,000	208,000
Outside services	1,089,000	924,000
Postage and delivery expenses	167,000	163,000
Newsprint and printing expenses	199,000	159,000
Depreciation and amortization	75,000	104,000
Equipment maintenance and software	303,000	240,000
Credit card merchant discount fees	425,000	411,000
Rent expenses	69,000	65,000
Accounting and legal fees	273,000	320,000
Other general and administrative expenses	1,095,000	739,000
Operating Expenses, Total	13,017,000	11,680,000
(Loss) income from operations	(716,000)	56,000
Other income (expense)
Dividends and interest income	1,069,000	875,000
Realized gains on sales of marketable securities	422,000	46,694,000
Net unrealized gains (losses) on marketable securities	24,025,000	(36,088,000)
Income before income taxes	23,927,000	11,438,000
Income tax provisions	(6,100,000)	(4,560,000)
Net income	$ 17,827,000	$ 6,878,000
Weighted average number of common shares outstanding - basic and diluted (in shares)	1,377,026	1,380,746
Basic and diluted net income per share (in dollars per share)	$ 12.95	$ 4.98
Comprehensive income	$ 17,827,000	$ 6,878,000
Margin Account [Member]
Other income (expense)
Interest expense on debt	(861,000)	(86,000)
Real Estate Bank Loan Secured by Logan Office [Member]
Other income (expense)
Interest expense on debt	(12,000)	(13,000)
Advertising [Member]
Revenue from Contract with Customer, Including Assessed Tax	1,990,000	2,001,000
Subscription and Circulation [Member]
Revenue from Contract with Customer, Including Assessed Tax	1,098,000	1,110,000
Advertising Service Fees and Other [Member]
Revenue from Contract with Customer, Including Assessed Tax	699,000	671,000
License and Maintenance [Member]
Revenue from Contract with Customer, Including Assessed Tax	4,395,000	4,480,000
Consulting Fees [Member]
Revenue from Contract with Customer, Including Assessed Tax	2,322,000	1,761,000
Service, Other [Member]
Revenue from Contract with Customer, Including Assessed Tax	$ 1,797,000	$ 1,713,000