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Collaboration and Licensing Agreements - Additional Information (Detail)
1 Months Ended 3 Months Ended
Jul. 31, 2013
USD ($)
Jun. 30, 2013
USD ($)
Jun. 30, 2013
EUR (€)
Mar. 31, 2016
USD ($)
Mar. 31, 2015
USD ($)
Dec. 31, 2015
USD ($)
Jun. 30, 2013
EUR (€)
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]              
Description of agreement expire term       The agreement will expire at the later of the last-to-expire patent in the EEA or ten years from the first commercial sale of the test in the EEA, which occurred in 2014.      
Common stock value       $ 12,000   $ 12,000  
Refundable upfront payments   $ 344,000 € 250,000        
Upfront cash payment   503,000 € 387,500        
Shares sold for consideration $ 467,000            
Revenues recognized from the arrangement       15,000 $ 27,000    
Royalty revenues       96,000 90,000    
Royalty revenues receivable balance       $ 0 $ 90,000    
Diaxonhit (DHT) [Member]              
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]              
Common stock value   $ 503,000         € 387,500