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Commitments and Contingencies - Additional Information (Detail) - USD ($)
1 Months Ended 9 Months Ended
Aug. 01, 2016
Jul. 31, 2016
Mar. 31, 2013
Dec. 31, 2010
Sep. 30, 2016
Sunnyvale Facility [Member]          
Commitment And Contingencies [Line Items]          
Proceeds from sale of property held for sale   $ 650,000      
Lease Terminations [Member]          
Commitment And Contingencies [Line Items]          
Exit date of previously leased facilities         Aug. 01, 2016
Prologis, L.P [Member]          
Commitment And Contingencies [Line Items]          
Term of lease     10 years    
Rent over term of lease     $ 3,497,000    
Refund of security deposit   $ 40,000      
BMR-Gateway Boulevard LLC [Member]          
Commitment And Contingencies [Line Items]          
Term of lease       11 years 6 months  
Rent over term of lease       $ 17,869,000  
Lease termination fee paid $ 800,000        
Amount of deposit forfeited $ 333,000