Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Sep. 30, 2012
Current Assets:
Cash and cash equivalents	$ 21,465	$ 15,540
Available-for-sale securities	9,496	14,117
Accounts receivable, net of allowance for doubtful accounts of $54 and $40 as of December 31, 2012 and September 30, 2012, respectively	4,416	5,069
Inventories	3,222	3,524
Deferred tax assets		219
Prepaids and other	478	603
Current assets of discontinued operations	809	883
Total Current Assets	39,886	39,955
Property and equipment, net	13,587	13,610
Available-for-sale securities	33,086	28,433
Deferred tax assets	5,972	5,806
Intangible assets, net	4,245	4,430
Goodwill	8,010	8,010
Other assets, net	3,030	2,831
Total Assets	107,816	103,075
Current Liabilities:
Accounts payable	943	1,657
Accrued liabilities:
Compensation	773	2,319
Accrued income taxes	2,003
Accrued other	1,367	1,066
Deferred revenue	46	47
Other current liabilities	163	170
Current liabilities of discontinued operations	1,640	1,640
Total Current Liabilities	6,935	6,899
Deferred revenue, less current portion	174	185
Other long-term liabilities	2,005	2,247
Total Liabilities	9,114	9,331
Commitments and Contingencies (Note 14)
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; 14,662,359 and 14,656,806 shares issued and outstanding, respectively	733	733
Additional paid-in capital	18,819	18,346
Accumulated other comprehensive income	277	40
Retained earnings	78,873	74,625
Total Stockholders' Equity	98,702	93,744
Total Liabilities and Stockholders' Equity	$ 107,816	$ 103,075