Consolidated Balance Sheets - USD ($)	Sep. 30, 2015	Sep. 30, 2014
Subscription Arrangement [Member]
LIABILITIES AND SHAREHOLDERS' EQUITY
Deferred Revenues	$ 3,474,000	$ 3,381,000
Deferred Installation Contracts [Member]
LIABILITIES AND SHAREHOLDERS' EQUITY
Deferred Revenues	7,820,000	8,896,000
Deferred Maintenance Agreement [Member]
LIABILITIES AND SHAREHOLDERS' EQUITY
Deferred Revenues	6,815,000	7,031,000
Cash and cash equivalents	15,617,000	15,410,000
Marketable securities, including common stocks of $158,705,000 and bonds of $7,336,000 at September 30, 2015 and common stocks of $165,734,000 and bonds of $7,942,000 at September 30, 2014	166,041,000	173,676,000
Accounts receivable, less allowance for doubtful accounts of $250,000 at September 30, 2015 and 2014	5,673,000	8,566,000
Inventories	48,000	51,000
Prepaid expenses and other assets	684,000	983,000
Income tax receivable	765,000	2,051,000
Total current assets	188,828,000	200,737,000
Land, buildings and improvements	12,773,000	12,814,000
Furniture, office equipment and computer software	2,655,000	2,889,000
Machinery and equipment	1,864,000	1,864,000
Property, plant and equipment, at cost	17,292,000	17,567,000
Less accumulated depreciation	(8,335,000)	(8,552,000)
Property, plant and equipment, net	8,957,000	9,015,000
Intangibles, net	12,990,000	17,744,000
Goodwill	13,400,000	13,400,000
Deferred income taxes, net	4,021,000	2,981,000
Assets	228,196,000	243,877,000
Accounts payable	4,212,000	4,344,000
Accrued liabilities	2,919,000	3,118,000
Deferred income taxes, net	40,641,000	46,502,000
Total current liabilities	65,881,000	73,272,000
Long term liabilities
Investment margin account borrowings	29,493,000	29,493,000
Deferred maintenance agreements	551,000	180,000
Income tax payable	2,991,000	3,244,000
Accrued interest and penalty for uncertain and unrecognized tax benefits	633,000	537,000
Accrued liabilities	47,000	780,000
Total long term liabilities	$ 33,715,000	$ 34,234,000
Commitments and contingencies (Notes 4 and 5)
Shareholders' equity
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, 2015 and 2014	14,000	14,000
Additional paid-in capital	1,755,000	1,755,000
Retained earnings	59,111,000	58,301,000
Accumulated other comprehensive income	67,720,000	76,301,000
Total shareholders' equity	128,600,000	136,371,000
Total shareholders' equity and liability	$ 228,196,000	$ 243,877,000