Consolidated Condensed Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Consolidated Condensed Statements Of Operations [Abstract]
Sales, net	$ 16,524	$ 13,768
Cost of sales	12,367	10,688
Gross profit	4,157	3,080
Operating expenses:
Sales and marketing	875	803
General and administrative	1,626	1,404
Research and development	1,137	1,249
Total operating expenses	3,638	3,456
Operating income (loss)	519	(376)
Interest expense	(179)	(142)
Equity in income (loss) of partnerships	(24)	209
Other (expense) income	(39)	(8)
Income (loss) before income taxes	277	(317)
Income tax expense (benefit)	34	(27)
Net income (loss)	$ 243	$ (290)
Net income (loss) per share:
Basic	$ 0.04	$ (0.05)
Diluted	$ 0.04	$ (0.05)
Average shares outstanding:
Basic	5,654	5,559
Diluted	5,933	5,559