Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Operating Activities:
Net income	$ 12,031	$ 15,167	$ 10,231
Adjustments to reconcile net income to net cash provided by operating activities from continuing operations:
Loss (income) from discontinued operations	176	(588)	(1,176)
Loss on sale of discontinued operations			1,074
Depreciation and amortization	2,715	2,886	2,929
Gains on sales of available-for-sale securities, net and strategic investments	(842)	(1,430)	(228)
Impairment losses on strategic investments	1,184	158	804
Amortization of premium on held-to-maturity securities			31
Stock-based compensation	3,337	2,552	2,671
Deferred taxes	(352)	(492)	(728)
Excess tax (benefit) deficiency from stock-based compensation plans	(236)	477	38
Loss (gain) on disposals of property and equipment	2	(62)	(36)
Change in operating assets and liabilities, excluding the impact of discontinued operations:
Accounts receivable	581	(263)	(685)
Inventories	511	196	(343)
Prepaids and other	(23)	(40)	15
Accounts payable and accrued liabilities	(738)	238	(2,663)
Income taxes	116	(989)	5,734
Deferred revenue	75	(29)	(42)
Net cash provided by operating activities from continuing operations	18,537	17,781	17,626
Investing Activities:
Purchases of property and equipment	(2,278)	(1,919)	(763)
Cash proceeds from sale of property and equipment		77
Purchases of available-for-sale securities	(138,363)	(45,053)	(43,840)
Sales and maturities of available-for-sale securities	162,673	44,853	43,556
Maturities of held-to-maturity securities			3,000
Cash received from sale of strategic investments	709	2,236
Cash (transferred to) received from discontinued operations	(354)	(116)	27,665
Net cash provided by investing activities from continuing operations	22,387	78	29,618
Financing Activities:
Excess tax benefit (deficiency) from stock-based compensation plans	236	(477)	(38)
Issuance of common stock	512	419	344
Repurchase of common stock	(12,545)	(17,805)	(54,991)
Purchases of common stock to pay employee taxes	(1,111)	(41)	(236)
Net cash used in financing activities from continuing operations	(12,908)	(17,904)	(54,921)
Net cash provided by (used in) continuing operations	28,016	(45)	(7,677)
Discontinued Operations:
Net cash used in operating activities	(354)	(116)	(1,514)
Net cash provided by investing activities			29,817
Net cash provided by (used in) financing activities	354	116	(28,303)
Net cash provided by discontinued operations	0	0	0
Net change in cash and cash equivalents	28,016	(45)	(7,677)
Cash and Cash Equivalents:
Beginning of year	15,495	15,540	23,217
End of year	43,511	15,495	15,540
Supplemental Information:
Cash paid for income taxes	6,295	7,115	2,060
Noncash transactions - acquisition of property and equipment on account	11	26	553
Noncash transactions - share repurchase accrual		1,004
Noncash transactions - issuance of performance shares, restricted and deferred stock units	$ 3,007