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Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 6 Months Ended 12 Months Ended 6 Months Ended 0 Months Ended 6 Months Ended 1 Months Ended 6 Months Ended 0 Months Ended 6 Months Ended
Jun. 30, 2014
Customer
Jun. 30, 2013
Jun. 30, 2014
Customer
Securities
Jun. 30, 2013
Dec. 31, 2013
Securities
Jun. 30, 2014
Up Front Payment Arrangement [Member]
Dec. 31, 2013
Up Front Payment Arrangement [Member]
Jun. 30, 2014
Guaranteed Investment Certificates [Member]
Jun. 30, 2014
Accounts Receivable [Member]
Customer Concentration Risk [Member]
Nov. 21, 2013
Collaboration Agreement [Member]
Jun. 30, 2014
Collaboration Agreement [Member]
Jul. 31, 2014
Collaboration Agreement [Member]
Subsequent Event [Member]
Jun. 30, 2014
Minimum [Member]
Jun. 30, 2014
Minimum [Member]
Building [Member]
Jun. 30, 2014
Minimum [Member]
Computer Equipment [Member]
Jun. 30, 2014
Minimum [Member]
Machinery and Equipment [Member]
Jun. 30, 2014
Minimum [Member]
Furniture and Fixtures [Member]
Jun. 30, 2014
Maximum [Member]
Jun. 30, 2014
Maximum [Member]
Building [Member]
Jun. 30, 2014
Maximum [Member]
Computer Equipment [Member]
Jun. 30, 2014
Maximum [Member]
Machinery and Equipment [Member]
Jun. 30, 2014
Maximum [Member]
Furniture and Fixtures [Member]
Jul. 31, 2012
DNA Genotek [Member]
Jun. 30, 2014
DNA Genotek [Member]
Product Information [Line Items]                                                
Available-for-sale securities, amortized cost               $ 4,437                                
Available-for-sale securities, fair value               4,437                                
Available-for-sale securities         0                                      
Fair value of plan assets 1,313   1,313   677                                      
Estimated useful lives of assets                           20 years 2 years 2 years 2 years   40 years 10 years 10 years 10 years    
Accumulated depreciation of property and equipment 29,843   29,843   28,390                                      
Fair value of goodwill                                               25,179
Impairment of goodwill                                             0  
Percentage of excess of fair value on carrying value                                               13.00%
Amount of goodwill at period end 23,674   23,674   23,782                                      
Payments received for sale of exclusive rights     75,000                                          
Additional annual payments to be received for sale of exclusive rights                         3,500         55,500            
Reserve for sales return and allowances     363   279                                      
Gain on contract termination settlement 5,500   5,500             8,300 5,500                          
Contract Supply service agreement period                     5 years                          
Receipt of contract termination settlement amount                       5,500                        
Deferred revenue 694   694   1,119 694 1,119                                  
Number of customers, accounted for significant concentrations 1   1                                          
Percentage of concentration risk                 11.00%                              
Concentration rate of accounts receivable 10.00%   10.00%                                          
Number of third-party suppliers to manufacture DNAG's products                                               2
Number of anti-dilutive securities excluded from EPS computation 3,594 5,684 3,646 5,237                                        
Accumulated foreign currency adjustments included in other comprehensive loss amounted $ 156 $ (2,585) $ 156 $ (2,585)