Consolidated Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Cash flows from operating activities
Net income (loss)	$ 14,739,000	$ (1,471,000)
Adjustments to reconcile net income (loss) to net cash used in operations
Depreciation and amortization	1,218,000	1,392,000
Deferred income taxes	(16,778,000)	(917,000)
Discounts earned on bonds	(1,000)	(1,000)
(Increase) decrease in current assets
Accounts receivable, net	1,166,000	(891,000)
Inventories		(9,000)
Prepaid expenses and other assets	157,000	5,000
Income tax receivable	(78,000)	645,000
Increase (decrease) in liabilities
Accounts payable	(98,000)	18,000
Accrued liabilities	(701,000)	(373,000)
Income taxes		(68,000)
Net cash used in operating activities	(814,000)	(1,311,000)
Cash flows from investing activities
Purchases of marketable securities		(5,013,000)
Purchases of property, plant and equipment	(34,000)	(187,000)
Net cash used in investing activities	(34,000)	(5,200,000)
Cash flows from financing activities
Payment of real estate loan principal	(28,000)	(27,000)
Net cash used in financing activities	(28,000)	(27,000)
Decrease in cash and cash equivalents	(876,000)	(6,538,000)
Cash and cash equivalents
Beginning of period	3,384,000	11,411,000
End of period	2,508,000	4,873,000
Interest paid during period	169,000	111,000
Net income taxes paid during period	6,000	3,000
Subscription Arrangement [Member]
Increase (decrease) in liabilities
Deferred revenue arrangements	(149,000)	(106,000)
Deferred Maintenance Agreement [Member]
Increase (decrease) in liabilities
Deferred revenue arrangements	419,000	678,000
Deferred Installation Contracts [Member]
Increase (decrease) in liabilities
Deferred revenue arrangements	$ (708,000)	$ (213,000)