Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Sep. 30, 2011
Current Assets:
Cash and cash equivalents	$ 60,184	$ 23,217
Available-for-sale securities	13,404	12,196
Held-to-maturity securities	0	3,030
Accounts receivable, net of allowance for doubtful accounts of $40 and $32 as of March 31, 2012 and September 30, 2011, respectively	4,628	4,385
Inventories	3,665	3,181
Deferred tax assets	79	142
Prepaids and other	3,494	2,268
Current assets of discontinued operations	1,428	5,983
Total Current Assets	86,882	54,402
Property and equipment, net	13,695	14,586
Available-for-sale securities	28,766	29,754
Deferred tax assets	9,224	9,017
Intangible assets, net	4,802	5,199
Goodwill	8,010	8,010
Other assets, net	3,024	3,303
Non-current assets of discontinued operations	0	32,511
Total Assets	154,403	156,782
Current Liabilities:
Accounts payable	1,496	1,572
Accrued liabilities:
Compensation	1,048	1,952
Accrued other	968	1,241
Deferred revenue	51	53
Other current liabilities	554	873
Current liabilities of discontinued operations	1,758	5,349
Total Current Liabilities	5,875	11,040
Deferred revenue, less current portion	207	222
Other long-term liabilities	2,391	2,421
Non-current liabilities of discontinued operations	0	3,491
Total Liabilities	8,473	17,174
Commitments and Contingencies (Note 17)
Stockholders' Equity:
Series A Preferred stock- $.05 par value, 450,000 shares authorized; no shares issued and outstanding
Common stock- $.05 par value, 45,000,000 shares authorized; 17,543,188 and 17,531,408 shares issued and outstanding	877	877
Additional paid-in capital	76,132	74,490
Accumulated other comprehensive income (loss)	97	(153)
Retained earnings	68,824	64,394
Total Stockholders' Equity	145,930	139,608
Total Liabilities and Stockholders' Equity	$ 154,403	$ 156,782