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Business Segment Information - Summary of Segment Information (Detail) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Dec. 31, 2013
Segment Reporting Information [Line Items]          
Net revenues $ 26,401 $ 24,337 $ 49,938 $ 45,501  
Operating income (loss) 2,497 (5,576) (3,121) (16,165)  
Depreciation and amortization 1,569 1,619 3,108 3,221  
Capital expenditures 1,341 612 1,988 1,092  
Total assets 179,565   179,565   184,245
OSUR [Member]
          
Segment Reporting Information [Line Items]          
Net revenues 21,505 19,683 39,283 36,915  
Operating income (loss) 2,203 (5,456) (4,190) (15,496)  
Depreciation and amortization 790 797 1,566 1,574  
Capital expenditures 1,131 484 1,570 727  
Total assets 125,845   125,845   130,848
DNAG [Member]
          
Segment Reporting Information [Line Items]          
Net revenues 4,896 4,654 10,655 8,586  
Operating income (loss) 294 (120) 1,069 (669)  
Depreciation and amortization 779 822 1,542 1,647  
Capital expenditures 210 128 418 365  
Total assets $ 53,720   $ 53,720   $ 53,397