Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Sep. 30, 2011
Current Assets:
Cash and cash equivalents	$ 65,868	$ 23,217
Available-for-sale securities	13,519	12,196
Held-to-maturity securities		3,030
Accounts receivable, net of allowance for doubtful accounts of $45 and $32 as of June 30, 2012 and September 30, 2011, respectively	5,177	4,385
Inventories	3,263	3,181
Deferred tax assets	312	142
Prepaids and other	1,560	2,268
Current assets of discontinued operations	1,130	5,983
Total Current Assets	90,829	54,402
Property and equipment, net	13,214	14,586
Available-for-sale securities	28,801	29,754
Deferred tax assets	9,215	9,017
Intangible assets, net	4,616	5,199
Goodwill	8,010	8,010
Other assets, net	2,990	3,303
Non-current assets of discontinued operations		32,511
Total Assets	157,675	156,782
Current Liabilities:
Accounts payable	740	1,572
Accrued liabilities:
Compensation	1,822	1,952
Accrued other	829	1,241
Deferred revenue	49	53
Other current liabilities	317	873
Current liabilities of discontinued operations	1,716	5,349
Total Current Liabilities	5,473	11,040
Deferred revenue, less current portion	196	222
Other long-term liabilities	2,355	2,421
Non-current liabilities of discontinued operations		3,491
Total Liabilities	8,024	17,174
Commitments and Contingencies (Note 16)
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; 00,000,000 and 17,531,408 shares issued and outstanding	877	877
Additional paid-in capital	76,749	74,490
Accumulated other comprehensive income (loss)	139	(153)
Retained earnings	71,886	64,394
Total Stockholders' Equity	149,651	139,608
Total Liabilities and Stockholders' Equity	$ 157,675	$ 156,782