Consolidated Statements Of Operations (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Consolidated Statements Of Operations [Abstract]
Net sales and revenues	$ 5,415,230	$ 5,833,904	$ 14,144,357	$ 16,206,680
Cost of sales and revenues	3,098,989	3,268,035	8,599,405	9,385,520
Gross profit	2,316,241	2,565,869	5,544,952	6,821,160
Operating expenses:
Selling, general and administrative expenses	982,893	912,216	2,831,590	2,835,950
Research and development expenses	506,618	495,784	1,505,394	1,414,536
Total operating expenses	1,489,511	1,408,000	4,336,984	4,250,486
Operating income	826,730	1,157,869	1,207,968	2,570,674
Financing income, net	21,270	19,426	64,237	47,101
Income before income taxes	848,000	1,177,295	1,272,205	2,617,775
Income tax expense	307,000	395,000	451,000	915,000
Net income	$ 541,000	$ 782,295	$ 821,205	$ 1,702,775
Net income per share:
Basic income per share	$ 0.12	$ 0.17	$ 0.18	$ 0.37
Diluted income per share	$ 0.11	$ 0.16	$ 0.17	$ 0.34