Condensed Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Dec. 30, 2016	Jan. 01, 2016
Net sales	$ 93,729	$ 85,298
Cost of sales	57,164	51,999
Gross profit	36,565	33,299
Operating expenses:
Marketing and selling	20,822	19,999
Administrative management, finance and information systems	10,561	10,154
Research and development	4,710	4,046
Total operating expenses	36,093	34,199
Operating profit (loss)	472	(900)
Interest income	(23)	(8)
Interest expense	486	190
Other expense (income), net	54	(563)
Loss before income taxes	(45)	(519)
Income tax (benefit) expense	(4,101)	15
Net income (loss)	$ 4,056	$ (534)
Participating securities	29	187
Weighted average common shares - Dilutive	9,874	9,981
Class A [Member]
Weighted average common shares - Basic:
Weighted average common shares - Basic	8,633	8,582
Net income (loss) per common share - Basic:
Net income (loss) per common share - Basic	$ 0.41	$ (0.05)
Net income (loss) per common share - Diluted:
Net income (loss) per common share - Diluted	0.40	(0.05)
Dividends declared per common share:
Dividends declared per common share	$ 0.09	$ 0.08
Class B [Member]
Weighted average common shares - Basic:
Weighted average common shares - Basic	1,212	1,212
Net income (loss) per common share - Basic:
Net income (loss) per common share - Basic	$ 0.37	$ (0.05)
Net income (loss) per common share - Diluted:
Net income (loss) per common share - Diluted	0.40	(0.05)
Dividends declared per common share:
Dividends declared per common share	$ 0.08	$ 0.07