Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies - Additional Information (Detail)

v3.7.0.1
Commitments and Contingencies - Additional Information (Detail) - USD ($)
1 Months Ended 3 Months Ended 6 Months Ended
Jun. 30, 2015
Jan. 31, 2017
Sep. 30, 2016
Jan. 31, 2016
Oct. 31, 2015
Jul. 31, 2015
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Commitments And Contingencies [Line Items]                      
Operating lease rent expense             $ 944,000 $ 923,000 $ 1,898,000 $ 1,887,000  
Sub-lease income             67,000 61,000 134,000 160,000  
Assets acquired under capital leases                 163,000    
Depreciation expense             226,000 190,000 434,000 369,000  
Capital Lease Assets                      
Commitments And Contingencies [Line Items]                      
Depreciation expense             36,000 31,000 74,000 62,000  
Additional Office Space                      
Commitments And Contingencies [Line Items]                      
Operating lease rent expense, net     $ 10,000           5,000    
Refundable security deposit             3,000   $ 3,000    
Lease commencement date     Oct. 01, 2017           May 01, 2014    
Lease expires     Nov. 30, 2024           Jul. 31, 2019    
Number of rent free periods                 3 months    
Rent credit     $ 40,000,000                
Office Space | Charlottesville, VA.                      
Commitments And Contingencies [Line Items]                      
Operating lease rent expense, net                 $ 2,000    
Refundable security deposit             2,000   $ 2,000    
Lease commencement date                 Jun. 30, 2015    
Lease expires                 Jun. 30, 2018    
Number of rent free periods                 2 months    
Office Space | Bedminster, NJ.                      
Commitments And Contingencies [Line Items]                      
Operating lease rent expense, net                 $ 11,000    
Lease expires                 Mar. 31, 2022    
Number of rent free periods                 4 months    
Office Space | Princeton, NJ.                      
Commitments And Contingencies [Line Items]                      
Operating lease rent expense, net       $ 6,000         $ 5,000    
Lease expires       Aug. 31, 2022         Apr. 30, 2016    
Number of rent free periods       5 months              
Office Space | New York City                      
Commitments And Contingencies [Line Items]                      
Operating lease rent expense, net                 $ 446,000    
Lease commencement date                 Oct. 01, 2017    
Lease expires                 Sep. 30, 2028    
Number of rent free periods                 12 months    
Payments for tenant improvements                 $ 2,080,000    
Office Space | Livingston, NJ                      
Commitments And Contingencies [Line Items]                      
Operating lease rent expense, net       $ 2,000              
Office Equipment                      
Commitments And Contingencies [Line Items]                      
Capital lease obligation             311,000   $ 311,000   $ 267,000
Office Equipment | Telephone System                      
Commitments And Contingencies [Line Items]                      
Lease expires                 Nov. 30, 2018    
Assets acquired under capital leases                 $ 321,000    
Capital lease, period                 5 years    
Capital lease, minimum monthly payment                 $ 5,000    
Office Equipment | Copier                      
Commitments And Contingencies [Line Items]                      
Lease expires   Dec. 31, 2018     Oct. 31, 2018 Jun. 30, 2018          
Assets acquired under capital leases   $ 11,000     $ 18,000 $ 21,000          
Capital lease, period   2 years     3 years 3 years          
Capital lease, minimum monthly payment   $ 1,000     $ 1,000 $ 1,000          
Office Equipment | Two Copiers                      
Commitments And Contingencies [Line Items]                      
Lease expires   Jan. 31, 2022                  
Assets acquired under capital leases   $ 152,000                  
Capital lease, period   5 years                  
Capital lease, minimum monthly payment   $ 3,000                  
Office Equipment | Jamison                      
Commitments And Contingencies [Line Items]                      
Assets acquired under capital leases $ 253,000                    
Letter of Credit                      
Commitments And Contingencies [Line Items]                      
Refundable security deposit             506,000   506,000   $ 506,000
Letter of Credit | Boston landlord                      
Commitments And Contingencies [Line Items]                      
Refundable security deposit             80,000   80,000    
General and administrative                      
Commitments And Contingencies [Line Items]                      
Operating lease rent expense, net             $ 877,000 $ 862,000 $ 1,764,000 $ 1,727,000