Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Sep. 30, 2013
Current Assets:
Cash and cash equivalents	$ 8,444	$ 15,495
Available-for-sale securities	25,399	10,212
Accounts receivable, net of allowance for doubtful accounts of $39 and $26 as of March 31, 2014 and September 30, 2013, respectively	5,610	5,332
Inventories	2,758	3,328
Deferred tax assets	315	506
Prepaids and other	2,081	860
Current assets of discontinued operations	46	46
Total Current Assets	44,653	35,779
Property and equipment, net	12,689	12,845
Available-for-sale securities	17,420	32,397
Deferred tax assets	6,427	6,038
Intangible assets, net	3,317	3,688
Goodwill	8,010	8,010
Other assets, net	3,166	3,166
Total Assets	95,682	101,923
Current Liabilities:
Accounts payable	1,091	954
Accrued liabilities:
Compensation	1,216	2,271
Accrued other	767	1,149
Share repurchase accrual		1,004
Deferred revenue	42	43
Restructuring and other current liabilities	2	416
Current liabilities of discontinued operations	126	139
Total Current Liabilities	3,244	5,976
Deferred revenue, less current portion	159	160
Other long-term liabilities	1,646	1,970
Total Liabilities	5,049	8,106
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; 13,584,989 and 13,891,402 shares issued and outstanding, respectively	679	695
Additional paid-in capital	2,026	2,028
Accumulated other comprehensive (loss) income	(10)	58
Retained earnings	87,938	91,036
Total Stockholders' Equity	90,633	93,817
Total Liabilities and Stockholders' Equity	$ 95,682	$ 101,923