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CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)
 3 Months Ended 6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2011
Jun. 30, 2010
REVENUES $ 3,165,342 $ 3,003,018 $ 6,020,997 $ 5,677,847
COST OF REVENUES (1,017,212) (1,002,403) (2,137,014) (1,927,815)
Gross profit 2,148,130 2,000,615 3,883,983 3,750,032
OPERATING EXPENSES        
Selling 473,955 445,311 988,083 952,831
General and administrative 948,095 1,549,125 2,109,498 2,814,683
Research and development 598,761 600,352 1,364,347 1,389,505
Total operating expenses 2,020,811 2,594,788 4,461,928 5,157,019
Income (loss) from operations 127,319 (594,173) (577,945) (1,406,987)
OTHER INCOME (EXPENSE)        
Interest income 13 23 28 57
Interest expense (2,500) (7,500) (5,000) (15,000)
Other Income Expense (2,487) (7,477) (4,972) (14,943)
Net income (loss) $ 124,832 $ (601,650) $ (582,917) $ (1,421,930)
Net income (loss) per common share -        
Basic (in dollars per share) $ 0 $ (0.02) $ (0.02) $ (0.05)
Diluted (in dollars per share) $ 0 $ (0.02) $ (0.02) $ (0.05)
Weighted average common shares used in computing per share amounts -        
Basic (in shares) 27,091,227 26,583,648 27,059,049 26,370,625
Diluted (in shares) 27,530,215 26,583,648 27,059,049 26,370,625