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Financial Information About Segments - Information About Results of Operations for Each Segment (Detail) (USD $)
3 Months Ended 12 Months Ended
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Segment Reporting Information [Line Items]                      
Technology Development revenue $ 2,858,000 $ 3,130,000 $ 2,807,000 $ 2,627,000 $ 3,598,000 $ 3,691,000 $ 3,895,000 $ 3,943,000 $ 11,421,868 $ 15,126,834 $ 15,586,123
Products and Licensing revenue 3,000,000 2,588,000 3,166,000 1,870,000 2,535,000 3,156,000 2,846,000 2,714,000 10,624,350 11,250,717 13,195,822
Total revenues 5,858,000 5,718,000 5,973,000 4,497,000 6,133,000 6,847,000 6,741,000 6,657,000 22,046,218 26,377,551 28,781,945
Operating income (loss) (2,264,000) (572,000) (917,000) (1,957,000) (1,049,000) (329,000) (391,000) (632,000) (5,710,490) (2,376,111) (2,847,879)
Depreciation                 500,000 800,000 1,000,000
Amortization                 400,000 300,000 500,000
Technology Development
                     
Segment Reporting Information [Line Items]                      
Operating income (loss)                 (3,169,605) (1,703,370) (3,210,228)
Depreciation                 286,894 499,439 619,035
Amortization                 197,765 212,790 295,600
Products and Licensing
                     
Segment Reporting Information [Line Items]                      
Operating income (loss)                 (2,540,885) (672,741) 362,349
Depreciation                 266,862 266,327 370,808
Amortization                 $ 183,956 $ 113,471 $ 177,067