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Commitments and Contingencies
3 Months Ended
Mar. 31, 2018
Commitments And Contingencies Disclosure [Abstract]  
COMMITMENTS AND CONTINGENCIES

6. COMMITMENTS AND CONTINGENCIES

Operating Leases—In September 2016, the Company entered into a noncancelable operating lease beginning in November 2016 for office, laboratory and manufacturing space in Bedford, Massachusetts, that expires in October 2021, with an option for an additional three-year term. In addition to the leased space, the Company has certain rights to expand the lease to include certain adjacent property. As of March 31, 2018, no expansion rights had been exercised.

In December 2017, the Company entered into a noncancelable operating lease for approximately 67,000 square feet of research and development, manufacturing and general office space in Bedford, Massachusetts. The lease expires in February 2027 with an option for an additional five-year term. Rent will be due under the lease in two phases with rent on the first 46,000 square feet starting in September 2018 and with rent on the remaining 21,000 square feet starting in March 2019. The initial annual base rent is $39.50 per square foot and will increase by three percent annually. The Company is obligated to pay, on a pro-rata basis, real estate taxes and operating costs related to the premises.

Future minimum lease payments as of March 31, 2018 are as follows:

 

Years Ending December 31

 

Amount

 

2018

 

$

1,312,813

 

2019

 

 

3,505,225

 

2020

 

 

3,750,149

 

2021

 

 

3,696,598

 

2022

 

 

2,928,014

 

Thereafter

 

 

13,177,338

 

Total future minimum lease payments

 

$

28,370,137

 

 

The lease agreement entered into in December 2017 allows for a tenant improvement allowance not to exceed $10.9 million to be applied to the total cost of tenant improvements to the leased premises. The tenant improvement allowance must be used on or before August 31, 2019 or it will be deemed forfeited with no further obligation by the landlord. Tenant improvement allowances due or received are recorded as deferred rent incentives on the Company’s condensed consolidated balance sheets, which are amortized to rent expense over the term of the lease. As of March 31, 2018, deferred rent incentives totaled $470,000.

Rent expense for three months ended March 31, 2018  and 2017 was $900,017 and $229,663, respectively. The Company maintains letters of credit, secured by restricted cash, for security deposits totaling $1.8 million as of March 31, 2018 and December 31, 2017, in conjunction with its current leases.