Condensed Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Condensed Consolidated Statements Of Operations
Net sales	$ 28,412	$ 27,594	$ 46,063	$ 44,472
Cost of goods sold	18,331	17,773	29,554	28,707
Gross profit	10,081	9,821	16,509	15,765
Selling, general and administrative expenses	6,889	6,743	12,803	12,229
Operating income	3,192	3,078	3,706	3,536
Interest:
Interest expense	122	91	249	193
Interest income	(48)	(29)	(106)	(76)
Interest expense, net	74	62	142	117
Other expense, net	25	43	28	86
Total other expense	99	105	171	203
Income before income taxes	3,093	2,973	3,536	3,333
Income tax expense	883	912	1,015	1,013
Net income	$ 2,210	$ 2,061	$ 2,520	$ 2,320
Basic earnings per share	$ 0.70	$ 0.66	$ 0.80	$ 0.74
Diluted earnings per share	$ 0.68	$ 0.66	$ 0.78	$ 0.74
Weighted average number of common shares outstanding - denominator used for basic per share computations	3,156	3,103	3,144	3,118
Weighted average number of dilutive stock options outstanding	110	41	90	24
Denominator used for diluted per share computations	3,266	3,144	3,234	3,142
Dividends declared per share	$ 0.08	$ 0.07	$ 0.15	$ 0.14