Consolidated Statements of Cash Flows (Unaudited) - USD ($)	6 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities
Net income	$ 14,507,000	$ 1,508,000
Adjustments to reconcile net income to net cash used in operations
Depreciation and amortization	2,117,000	2,781,000
Deferred income taxes	(17,012,000)	(2,115,000)
Gains on sale of bonds	(3,182,000)
Discounts earned on bonds		(1,000)
(Increase) decrease in current assets
Accounts receivable, net	1,119,000	(578,000)
Inventories	(6,000)	(9,000)
Prepaid expenses and other assets	186,000	55,000
Income tax receivable	55,000	240,000
Increase (decrease) in liabilities
Accounts payable	(151,000)	514,000
Accrued liabilities	(180,000)	(773,000)
Income taxes		(2,723,000)
Net cash used in operating activities	(4,153,000)	(2,100,000)
Cash flows from investing activities
Sales (purchases) of marketable securities	(8,125,000)
Sales (purchases) of marketable securities		(5,013,000)
Purchases of property, plant and equipment	(75,000)	(194,000)
Net cash provided by (used in) investing activities	8,050,000	(5,207,000)
Cash flows from financing activities
Payment of real estate loan principal	(57,000)	(54,000)
Net cash used in financing activities	(57,000)	(54,000)
Increase (decrease) in cash and cash equivalents	3,840,000	(7,361,000)
Cash and cash equivalents
Beginning of period	3,384,000	11,411,000
End of period	7,224,000	4,050,000
Interest paid during period	329,000	220,000
Net income taxes paid during period	6,000	16,000
Subscription Arrangement [Member]
Increase (decrease) in liabilities
Deferred revenue arrangements	(167,000)	(122,000)
Deferred Maintenance Agreement [Member]
Increase (decrease) in liabilities
Deferred revenue arrangements	(711,000)	511,000
Deferred Installation Contracts [Member]
Increase (decrease) in liabilities
Deferred revenue arrangements	$ (730,000)	$ (1,388,000)