Annual report pursuant to Section 13 and 15(d)

Excess Lease Liability - Additional Information (Detail)

v3.6.0.2
Excess Lease Liability - Additional Information (Detail) - USD ($)
 1 Months Ended
Feb. 28, 2015
Sep. 30, 2016
Operating Leased Assets [Line Items]    
Lease termination agreement, additional fee payable $ 1,300,000  
BMR-217TH Place LLC [Member]    
Operating Leased Assets [Line Items]    
Lease termination agreement, date of termination Mar. 01, 2015  
Reversed lease termination liability current   $ 1,300,000
BMR-217TH Place LLC [Member] | Termination Fee [Member]    
Operating Leased Assets [Line Items]    
Lease termination agreement, fee paid $ 2,000,000  
Minimum [Member] | BMR-217TH Place LLC [Member]    
Operating Leased Assets [Line Items]    
Amount of funding to raise that would trigger payment of additional termination fee $ 20,000,000