Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands	Jun. 30, 2011	Sep. 30, 2010
Current assets:
Cash and cash equivalents	$ 59,942	$ 50,943
Marketable securities	38,483	36,634
Accounts receivable, net	27,719	24,090
Inventories	24,906	26,550
Deferred tax assets	2,891	3,344
Other	2,795	2,141
Total current assets	156,736	143,702
Marketable securities, long-term	6,733	0
Property, equipment and improvements, net	15,799	16,396
Identifiable intangible assets, net	15,630	19,851
Goodwill	86,605	86,210
Deferred tax assets	3,242	320
Other	523	486
Total assets	285,268	266,965
Current liabilities:
Accounts payable	7,398	7,449
Income taxes payable	1,824	82
Accrued compensation	7,269	5,850
Deferred payment on acquisition	2,993	2,914
Other	4,865	5,302
Total current liabilities	24,349	21,597
Income taxes payable	2,363	2,838
Deferred tax liabilities	986	1,457
Other noncurrent liabilities	342	517
Total liabilities	28,040	26,409
Commitments and contingencies (see Note 11)
Stockholders' equity:
Preferred stock, $.01 par value; 2,000,000 shares authorized; none issued and outstanding	0	0
Common stock, $.01 par value; 60,000,000 shares authorized; 28,947,903 and 28,666,311 shares issued	289	287
Additional paid-in capital	192,326	185,427
Retained earnings	99,819	91,649
Accumulated other comprehensive loss	(8,647)	(9,589)
Treasury stock, at cost, 3,497,375 and 3,584,215 shares	(26,559)	(27,218)
Total stockholders' equity	257,228	240,556
Total liabilities and stockholders' equity	$ 285,268	$ 266,965