Consolidated Balance Sheets - USD ($)	Sep. 30, 2016	Sep. 30, 2015
Subscription Arrangement [Member]
LIABILITIES AND SHAREHOLDERS' EQUITY
Deferred revenue	$ 3,402,000	$ 3,474,000
Deferred Installation Contracts [Member]
LIABILITIES AND SHAREHOLDERS' EQUITY
Deferred revenue	6,536,000	7,820,000
Deferred Maintenance Agreement [Member]
LIABILITIES AND SHAREHOLDERS' EQUITY
Deferred revenue	8,084,000	6,815,000
Cash and cash equivalents	11,411,000	15,617,000
Marketable securities at fair value, including common stocks of $158,462,000 and bonds of $8,172,000 at September 30, 2016 and common stocks of $158,705,000 and bonds of $7,336,000 at September 30, 2015	166,634,000	166,041,000
Accounts receivable, less allowance for doubtful accounts of $200,000 and $250,000 at September 30, 2016 and September 30, 2015, respectively	4,707,000	5,673,000
Inventories	41,000	48,000
Prepaid expenses and other current assets	800,000	684,000
Income tax receivable	890,000	765,000
Total current assets	184,483,000	188,828,000
Land, buildings and improvements	16,306,000	12,773,000
Furniture, office equipment and computer software	2,743,000	2,655,000
Machinery and equipment	1,864,000	1,864,000
	20,913,000	17,292,000
Less accumulated depreciation	(8,849,000)	(8,335,000)
	12,064,000	8,957,000
Intangibles, net	7,953,000	12,990,000
Goodwill	13,400,000	13,400,000
Deferred income taxes, net	7,546,000	4,021,000
	225,446,000	228,196,000
Accounts payable	2,644,000	4,212,000
Accrued liabilities	2,583,000	2,919,000
Note payable collateralized by real estate	110,000
Deferred income taxes, net	41,501,000	40,641,000
Total current liabilities	64,860,000	65,881,000
Investment margin account borrowings	29,493,000	29,493,000
Note payable collateralized by real estate	2,071,000
Deferred maintenance agreements	149,000	551,000
Income tax payable	2,723,000	2,991,000
Accrued interest and penalty for uncertain and unrecognized tax benefits	745,000	633,000
Accrued liabilities	62,000	47,000
Total long term liabilities	35,243,000	33,715,000
Commitments and contingencies (Notes 4 and 5)
Preferred stock, $.01 par value, 5,000,000 shares authorized and no shares issued	0	0
Common stock, $.01 par value, 5,000,000 shares authorized; 1,805,053 shares issued, including 424,307 treasury shares, at September 30, 2016 and September 30, 2015	14,000	14,000
Additional paid-in capital	1,755,000	1,755,000
Retained earnings	58,068,000	59,111,000
Accumulated other comprehensive income	65,506,000	67,720,000
Total shareholders' equity	125,343,000	128,600,000
	$ 225,446,000	$ 228,196,000