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Schedule of Quarterly Financial Information (Detail) (USD $)
3 Months Ended 12 Months Ended
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Revenues:                      
Technology $ 5,230,000 $ 4,875,000 $ 5,334,000 $ 5,659,000 $ 5,011,000 $ 6,162,000 $ 5,623,000 $ 5,622,000 $ 21,098,286 $ 22,417,902 $ 22,404,931
Product and license 2,535,000 3,156,000 2,846,000 2,714,000 3,137,000 2,681,000 4,001,000 3,377,000 11,250,717 13,195,822 12,133,463
Total revenues 7,765,000 8,031,000 8,180,000 8,373,000 8,148,000 8,843,000 9,624,000 8,999,000 32,349,003 35,613,724 34,538,394
Gross Margin 2,664,000 3,146,000 3,145,000 3,223,000 2,736,000 3,493,000 3,661,000 3,340,000 12,178,073 13,230,502 12,943,719
Operating loss (547,000) (174,000) (191,000) (273,000) (433,000) 313,000 (210,000) (898,000) (1,184,500) (1,233,094) (2,048,629)
Net income / (loss) (587,000) (220,000) (243,000) (335,000) (353,000) 243,000 (257,000) (1,025,000) (1,384,385) (1,392,360) (2,620,030)
Net (loss) attributable to common stockholders $ (612,000) $ (254,000) $ (269,000) $ (369,000) $ (386,000) $ 222,000 $ (289,000) $ (1,066,000) $ (1,504,139) $ (1,519,822) $ (2,980,661)
Net (loss) Income per share:                      
Basic $ (0.04) $ (0.02) $ (0.02) $ (0.03) $ (0.03) $ 0.02 $ (0.02) $ (0.08)      
Diluted $ (0.04) $ (0.02) $ (0.02) $ (0.03) $ (0.03) $ 0.01 $ (0.02) $ (0.08)      
Weighted average shares:                      
Basic 14,008,772 13,939,938 13,892,816 13,850,667 13,794,361 13,669,724 13,636,993 13,484,645      
Diluted 14,008,772 13,939,938 13,892,816 13,850,667 13,794,361 15,898,639 13,636,993 13,484,645