Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Operating Activities:
Net income	$ 4,248	$ 2,706
Adjustments to reconcile net income to net cash provided by operating activities from continuing operations:
Income from discontinued operations		(1,605)
Loss on sale of discontinued operations		1,054
Depreciation and amortization	722	749
Stock-based compensation	392	893
Deferred tax	27	(57)
Gain on sale of strategic investment	(1,174)
Amortization of premium on held-to-maturity securities		20
Reduction of tax benefit from stock-based compensation plans	4	16
Other	(2)	(4)
Change in operating assets and liabilities:
Accounts receivable	653	(383)
Inventories	302	209
Prepaids and other	111	(48)
Accounts payable and accrued liabilities	(1,499)	(2,872)
Income taxes	1,623	1,263
Net cash provided by operating activities from continuing operations	5,407	1,941
Investing Activities:
Purchases of property and equipment	(857)	(157)
Purchases of available-for-sale securities	(843)	(2,724)
Sales and maturities of available-for-sale securities	805	2,641
Cash received from discontinued operations	75	24,548
Cash received from sale of a strategic investment	1,258
Net cash provided by investing activities from continuing operations	438	24,308
Financing Activities:
Reduction of tax benefit from stock-based compensation plans	(4)	(16)
Issuance of common stock	84	79
Purchase of common stock to pay employee taxes		(170)
Net cash provided by (used in) financing activities from continuing operations	80	(107)
Net cash provided by continuing operations	5,925	26,142
Discontinued Operations:
Net cash provided by (used in) operating activities	75	(2,344)
Net cash provided by investing activities		26,892
Net cash used in financing activities	(75)	(24,548)
Net cash provided by discontinued operations
Net change in cash and cash equivalents	5,925	26,142
Cash and Cash Equivalents:
Beginning of period	15,540	23,217
End of period	21,465	49,359
Supplemental Information:
Cash paid for income taxes	228	23
Noncash transactions - acquisition of property and equipment on account	$ 209	$ 8