Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Operating Activities:
Net income	$ 6,089	$ 8,350
Adjustments to reconcile net income to net cash provided by operating activities from continuing operations:
Income from discontinued operations		(682)
Depreciation and amortization	1,380	1,446
Stock-based compensation	2,462	1,238
Deferred taxes	(164)	172
Gain on sales of available-for-sale securities and strategic investments	(806)	(1,458)
Impairment loss on investments		129
Excess tax (benefit) deficiency from stock-based compensation plans	(658)	191
Change in operating assets and liabilities:
Accounts receivable	(278)	158
Inventories	570	160
Prepaids and other	(330)	(191)
Accounts payable and accrued liabilities	(1,770)	(1,366)
Income taxes	(559)	(1,322)
Net cash provided by operating activities from continuing operations	5,936	6,825
Investing Activities:
Purchases of property and equipment	(798)	(1,239)
Purchases of available-for-sale securities	(92,700)	(26,091)
Sales and maturities of available-for-sale securities	92,514	25,980
Cash received from sales of strategic investments	681	2,286
Cash transferred to discontinued operations	(13)	(86)
Net cash (used in) provided by investing activities from continuing operations	(316)	850
Financing Activities:
Excess tax benefit (deficiency) from stock-based compensation plans	658	(191)
Issuance of common stock	329	233
Repurchase of common stock	(12,544)	(2,681)
Purchase of common stock to pay employee taxes	(1,114)	(39)
Net cash used in financing activities from continuing operations	(12,671)	(2,678)
Net cash (used in) provided by continuing operations	(7,051)	4,997
Discontinued Operations:
Net cash used in operating activities	(13)	(86)
Net cash provided by financing activities	13	86
Net cash provided by discontinued operations
Net change in cash and cash equivalents	(7,051)	4,997
Cash and Cash Equivalents:
Beginning of period	15,495	15,540
End of period	8,444	20,537
Supplemental Information:
Cash paid for income taxes	3,401	3,945
Noncash transactions - acquisition of property and equipment on account	82	7
Noncash transactions - issuance of performance shares, restricted and deferred stock units	$ 3,007