Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)	6 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Cash flows from operating activities
Net income	$ 3,750,000	$ 4,026,000
Adjustments to reconcile net income to net cash provided by operations
Depreciation and amortization	245,000	284,000
Deferred income taxes	212,000	(12,000)
Net premium amortized and discount earned on bonds and U.S. Treasury Bills	(1,000)	(10,000)
Decrease (increase) in current assets
Accounts receivable, net	1,929,000	1,482,000
Inventories	13,000	(5,000)
Prepaid expenses and other assets	(76,000)	(24,000)
Increase (decrease) in current liabilities
Accounts payable	(354,000)	(81,000)
Accrued liabilities	(1,325,000)	(1,006,000)
Income taxes	(435,000)	(124,000)
Deferred subscription and other revenues	143,000	258,000
Net cash provided by operating activities	4,101,000	4,788,000
Cash flows from investing activities
Maturities and sales of U.S. Treasury Bills	13,100,000	36,299,000
Purchases of U.S. Treasury Bills	(500,000)	(28,590,000)
Purchases of marketable securities	(13,581,000)	(10,364,000)
Purchases of property, plant and equipment	(300,000)	(55,000)
Net cash used in investing activities	(1,281,000)	(2,710,000)
Increase in cash and cash equivalents	2,820,000	2,078,000
Cash and cash equivalents
Beginning of period	3,058,000	3,615,000
End of period	$ 5,878,000	$ 5,693,000