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Business Segment Information - Summary of Operating Segment and Asset Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Dec. 31, 2014
Segment Reporting Information [Line Items]          
Net revenues $ 29,861 $ 27,845 $ 87,337 $ 77,783  
Operating income (loss) 1,536 882 3,966 (2,239)  
Depreciation and amortization 1,410 1,624 4,259 4,732  
Capital expenditures 740 365 1,885 2,353  
Total assets 193,846   193,846   $ 189,633
OSUR [Member]          
Segment Reporting Information [Line Items]          
Net revenues 22,532 20,978 65,189 60,260  
Operating income (loss) 725 (987) (111) (5,177)  
Depreciation and amortization 764 820 2,224 2,386  
Capital expenditures 536 298 1,102 1,868  
Total assets 141,506   141,506   136,542
DNAG [Member]          
Segment Reporting Information [Line Items]          
Net revenues 7,329 6,867 22,148 17,523  
Operating income (loss) 811 1,869 4,077 2,938  
Depreciation and amortization 646 804 2,035 2,346  
Capital expenditures 204 $ 67 783 $ 485  
Total assets $ 52,340   $ 52,340   $ 53,091