Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Sep. 30, 2012
Current Assets:
Cash and cash equivalents	$ 17,711	$ 15,540
Available-for-sale securities	10,723	14,117
Accounts receivable, net of allowance for doubtful accounts of $40 as of June 30, 2013 and September 30, 2012, respectively	4,736	5,069
Inventories	3,210	3,524
Deferred tax assets	188	219
Prepaids and other	1,720	603
Current assets of discontinued operations	45	883
Total Current Assets	38,333	39,955
Property and equipment, net	12,870	13,610
Available-for-sale securities	31,694	28,433
Deferred tax assets	6,000	5,806
Intangible assets, net	3,874	4,430
Goodwill	8,010	8,010
Other assets, net	3,145	4,075
Total Assets	103,926	104,319
Current Liabilities:
Accounts payable	736	1,657
Accrued liabilities:
Compensation	1,933	2,319
Accrued other	872	1,066
Deferred revenue	44	47
Other current liabilities	89	170
Current liabilities of discontinued operations	125	1,640
Total Current Liabilities	3,799	6,899
Deferred revenue, less current portion	171	185
Other long-term liabilities	1,917	2,247
Total Liabilities	5,887	9,331
Commitments and Contingencies (Note 15)
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; 14,273,121 and 14,656,806 shares issued and outstanding, respectively	714	733
Additional paid-in capital	10,007	18,346
Accumulated other comprehensive (loss) income	(32)	40
Retained earnings	87,350	75,869
Total Stockholders' Equity	98,039	94,988
Total Liabilities and Stockholders' Equity	$ 103,926	$ 104,319