CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (USD $) In Thousands, except Share data	3 Months Ended		9 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Net sales	$ 47,453	$ 44,506	$ 142,245	$ 137,241
Cost of sales	23,546	21,523	69,462	65,441
Gross profit	23,907	22,983	72,783	71,800
Operating expenses
Selling, general and administrative	17,076	16,381	51,323	49,809
Amortization of intangible assets	419	329	1,213	941
Income from operations	6,412	6,273	20,247	21,050
Interest and other (income) expense, net	293	147	802	403
Income before provision for income taxes	6,119	6,126	19,445	20,647
Provision for income taxes	2,174	2,332	7,001	7,808
Net income	3,945	3,794	12,444	12,839
Other comprehensive income (loss)
Foreign currency translation adjustment, net of tax	71	(221)	235	(296)
Comprehensive income	$ 4,016	$ 3,573	$ 12,679	$ 12,543
Net income per common share
Basic (in dollars per share)	$ 0.38	$ 0.37	$ 1.20	$ 1.23
Diluted (in dollars per share)	$ 0.38	$ 0.36	$ 1.19	$ 1.22
Weighted average common shares outstanding
Basic (in shares)	10,302,791	10,386,829	10,350,808	10,420,505
Dilutive effect of stock options (in shares)	62,992	106,176	67,031	93,568
Diluted (in shares)	10,365,783	10,493,005	10,417,839	10,514,073