Consolidated Condensed Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Consolidated Condensed Statements Of Operations [Abstract]
Sales, net	$ 16,602	$ 17,310
Cost of sales	12,274	12,537
Gross profit	4,328	4,773
Operating expenses:
Sales and marketing	987	1,007
General and administrative	1,709	1,624
Research and development	1,226	1,168
Restructuring charges (Note 3)		83
Total operating expenses	3,922	3,882
Operating income	406	891
Interest expense	(103)	(138)
Other income	136	60
Income from continuing operations before income taxes and discontinued operations	439	813
Income tax expense	155	26
Income before discontinued operations	284	787
Loss on sale of discontinued operations		(120)
Loss from discontinued operations, net of income taxes (Note 4)		(150)
Net income	$ 284	$ 517
Basic income (loss) per share:
Continuing operations	$ 0.05	$ 0.14
Discontinued operations		$ (0.05)
Net income per share:	$ 0.05	$ 0.09
Diluted income (loss) per share:
Continuing operations	$ 0.05	$ 0.14
Discontinued operations		$ (0.05)
Net income per share:	$ 0.05	$ 0.09
Average shares outstanding:
Basic	5,849	5,729
Diluted	6,227	5,859