Consolidated Statements of Income and Comprehensive Income (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Revenues
Revenue from Contract with Customer, Including Assessed Tax	$ 13,562,000	$ 12,874,000	$ 37,952,000	$ 36,907,000
Costs and expenses
Salaries and employee benefits	9,435,000	9,662,000	27,228,000	28,227,000
Outside services	794,000	586,000	2,236,000	2,600,000
Postage and delivery expenses	160,000	151,000	490,000	552,000
Newsprint and printing expenses	162,000	157,000	469,000	528,000
Depreciation and amortization	114,000	128,000	344,000	384,000
Equipment maintenance and software	298,000	276,000	946,000	1,102,000
Credit card merchant discount fees	462,000	244,000	1,397,000	1,014,000
Rent expenses	66,000	158,000	228,000	500,000
Accounting and legal fees	252,000	272,000	746,000	730,000
Other general and administrative expenses	495,000	647,000	1,554,000	3,293,000
Total operating expenses	12,238,000	12,281,000	35,638,000	38,930,000
Income from operations	1,324,000	593,000	2,314,000	(2,023,000)
Other income (expense)
Dividends and interest income	776,000	1,596,000	2,063,000	4,573,000
Other income	69,000	0	69,000	3,000
Net unrealized gains on marketable securities	55,686,000	16,489,000	131,754,000	(41,191,000)
Interest expense on debt	(68,000)		(196,000)
Income before income taxes	57,773,000	18,594,000	154,434,000	(39,102,000)
Income tax provisions	(15,200,000)	(4,320,000)	(40,115,000)	11,260,000
Net income	$ 42,573,000	$ 14,274,000	$ 114,319,000	$ (27,842,000)
Weighted average number of common shares outstanding - basic and diluted (in shares)	1,380,746	1,380,746	1,380,746	1,380,746
Basic and diluted net income per share (in dollars per share)	$ 30.83	$ 10.34	$ 82.80	$ (20.16)
Comprehensive income	$ 42,573,000	$ 14,274,000	$ 114,319,000	$ (27,842,000)
Realized gains on sales of marketable securities			18,478,000	0
Net unrealized gains (losses) on marketable securities		16,489,000	131,754,000	(41,191,000)
Real Estate Bank Loan Secured by Logan Office [Member]
Other income (expense)
Interest expense on debt	(14,000)	(20,000)	(48,000)	(63,000)
Margin Account [Member]
Other income (expense)
Interest expense on debt	(68,000)	(64,000)	(196,000)	(401,000)
Advertising [Member]
Revenues
Revenue from Contract with Customer, Including Assessed Tax	2,195,000	1,297,000	5,649,000	5,415,000
Subscription and Circulation [Member]
Revenues
Revenue from Contract with Customer, Including Assessed Tax	1,126,000	1,259,000	3,458,000	3,857,000
Advertising Service Fees and Other [Member]
Revenues
Revenue from Contract with Customer, Including Assessed Tax	762,000	575,000	1,964,000	1,923,000
License and Maintenance [Member]
Revenues
Revenue from Contract with Customer, Including Assessed Tax	5,602,000	5,531,000	16,990,000	16,246,000
Consulting Fees [Member]
Revenues
Revenue from Contract with Customer, Including Assessed Tax	2,100,000	3,147,000	4,649,000	5,065,000
Service, Other [Member]
Revenues
Revenue from Contract with Customer, Including Assessed Tax	$ 1,777,000	$ 1,065,000	$ 5,242,000	$ 4,401,000