Quarterly report pursuant to Section 13 or 15(d)

Quarterly report pursuant to Section 13 or 15(d)

Commitments (Detail)

v3.10.0.1
Commitments (Detail) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2018
Jun. 30, 2017
Contractual Obligation [Line Items]      
Capital lease obligation amount   $ 3,733,000 $ 2,557,000
Laboratory And Computer Equipment      
Contractual Obligation [Line Items]      
Capital lease obligation amount $ 300,000 $ 3,700,000  
Lease term   36 months  
Capital leases buy out amount $ 1 $ 1  
Minimum | Laboratory And Computer Equipment      
Contractual Obligation [Line Items]      
Capital lease interest rate 4.60% 4.60%  
Maximum | Laboratory And Computer Equipment      
Contractual Obligation [Line Items]      
Capital lease interest rate 5.80% 5.80%