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Segments and Geographic Information - Revenues, Expenses and Operating Income (Loss) by Market Segment (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Revenues:        
Total revenues $ 2,136 $ 1,963 $ 5,573 $ 5,200
Operating expenses:        
Total operating expenses 2,758 3,997 9,098 11,542
Operating income (loss):        
Total operating income (loss) (622) (2,034) (3,525) (6,342)
Cosmetic Market [Member]        
Revenues:        
Total revenues 923 970 2,648 2,519
Operating expenses:        
Total operating expenses 872 837 2,361 2,410
Operating income (loss):        
Total operating income (loss) 51 133 287 109
Biomedical Market [Member]        
Revenues:        
Total revenues 1,213 993 2,925 2,681
Operating expenses:        
Total operating expenses 706 702 2,005 2,065
Operating income (loss):        
Total operating income (loss) 507 291 920 616
Therapeutic Market [Member]        
Operating expenses:        
Total operating expenses 1,180 2,458 4,732 7,067
Operating income (loss):        
Total operating income (loss) $ (1,180) $ (2,458) $ (4,732) $ (7,067)