CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Income Statement [Abstract]
Net sales	$ 56,619	$ 55,959
Cost of sales	27,679	27,851
Gross profit	28,940	28,108
Operating expenses
Selling, general and administrative	21,255	20,342
Amortization of intangible assets	918	981
Income from operations	6,767	6,785
Interest and other expense, net	330	274
Income before provision for income taxes	6,437	6,511
Provision for income taxes	2,236	2,270
Net income	4,201	4,241
Other comprehensive loss:
Foreign currency translation adjustment, net of tax	(161)	(79)
Comprehensive income	$ 4,040	$ 4,162
Net income per common share
Basic (in dollars per share)	$ 0.46	$ 0.45
Diluted (in dollars per share)	$ 0.46	$ 0.45
Weighted average common shares outstanding
Basic (in shares)	9,212,331	9,459,470
Dilutive effect of equity awards (in shares)	0	0
Diluted (in shares)	9,212,331	9,459,470
Cash dividend declared per common share (in dollars per share)	$ 0.13	$ 0.00