Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Sep. 30, 2011
Current Assets:
Cash and cash equivalents	$ 49,359	$ 23,217
Available-for-sale securities	10,555	12,196
Held-to-maturity securities	3,010	3,030
Accounts receivable, net of allowance for doubtful accounts of $46 and $32 as of December 31, 2011 and September 30, 2011, respectively	4,767	4,385
Inventories	2,972	3,181
Deferred tax assets	103	142
Prepaids and other	7,342	2,268
Current assets of discontinued operations	3,117	5,983
Total Current Assets	81,225	54,402
Property and equipment, net	14,042	14,586
Available-for-sale securities	31,500	29,754
Deferred tax assets	9,225	9,017
Intangible assets, net	4,987	5,199
Goodwill	8,010	8,010
Other assets, net	2,998	3,303
Non-current assets of discontinued operations	0	32,511
Total Assets	151,987	156,782
Current Liabilities:
Accounts payable	879	1,572
Accrued liabilities:
Compensation	823	1,952
Accrued other	1,801	1,241
Deferred revenue	51	53
Other current liabilities	930	873
Current liabilities of discontinued operations	1,984	5,349
Total Current Liabilities	6,468	11,040
Deferred revenue, less current portion	210	222
Other long-term liabilities	2,368	2,421
Non-current liabilities of discontinued operations	0	3,491
Total Liabilities	9,046	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; 17,527,914 and 17,531,408 shares issued and outstanding	876	877
Additional paid-in capital	75,298	74,490
Accumulated other comprehensive loss	(333)	(153)
Retained earnings	67,100	64,394
Total Stockholders' Equity	142,941	139,608
Total Liabilities and Stockholders' Equity	$ 151,987	$ 156,782