Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Income Statement [Abstract]
Sales, net	$ 7,600	$ 8,112	$ 20,864	$ 21,809
Expenses
Cost of products	4,328	4,084	11,640	11,473
Selling, general and administrative	2,505	2,633	7,580	7,598
Total expenses	6,833	6,717	19,220	19,071
Operating income	767	1,395	1,644	2,738
Other income (expense):
Net interest expense	0	0	0	(3)
Other income (expense)	0	(3)	11	(10)
Total other income (expense)	0	(3)	11	(13)
Income before income taxes	767	1,392	1,655	2,725
Income tax expense	(253)	(508)	(539)	(996)
Net income	$ 514	$ 884	$ 1,116	$ 1,729
Net earnings per share-basic:	$ 0.04	$ 0.07	$ 0.08	$ 0.13
Net earnings per share-diluted:	$ 0.04	$ 0.07	$ 0.08	$ 0.13
Weighted average shares outstanding-basic	13,580,471	13,545,482	13,563,486	13,541,250
Weighted average shares outstanding-diluted	13,648,570	13,549,146	13,619,676	13,543,631