10. COMMITMENTS AND CONTINGENCIES

Lease Commitments

The Company leases office space pursuant to operating leases that are subject to specific escalation clauses. Rent expense charged to operations for the three months ended March 31, 2019 and 2018 amounted to $1,529 and $1,511, respectively. The Company received sub-lease income from sub-tenants during the three months ended March 31, 2019 and 2018 of $32 and $75, respectively. Therefore, for the three months ended March 31, 2019 and 2018, net rent expense amounted to $1,497 and $1,436, respectively, and is included in general and administrative expenses in the Condensed Consolidated Statements of Operations.

As security for performance under the leases, the Company is required to maintain letters of credit in favor of the landlord totaling $506 as of March 31, 2019 and December 31, 2018.  Furthermore, the Company maintains an $80 letter of credit in favor of its Boston landlord. Both are collateralized by the Company’s revolving credit facility with City National Bank.

In March 2014, the Company entered into a lease agreement for additional office space in Richmond, VA.  The lease commenced on May 1, 2014 and expires July 31, 2019. The lease is subject to escalation clauses and provides for a rent-free period of three months.  Monthly rent expense is $5.  The Company paid a refundable security deposit of $3.  In September 2016, the Company entered into Lease Amendment Number One (“Amendment Number One”) to expand its space and extend its lease.  This expansion was to occur on or about October 1, 2017, and the lease was extended to November 30, 2024.  The lease was further amended on January 16, 2018 (“Amendment Number Two”) to update the expansion date to January 12, 2018 and to extend the term of the lease to November 30, 2028.  The amended lease provides for a rent credit of $40.  Monthly rent expense under the amended lease is $10.

In June 2015, the Company entered into a lease agreement for office space in Charlottesville, VA.  The lease commenced on June 30, 2015 and expired on June 30, 2018.  The Company extended this lease for one year, with the new term beginning on July 1, 2018 and expiring on June 30, 2019.  Monthly rent expense is $2.  The Company paid a refundable security deposit of $2.

In connection with the Jamison Acquisition, the Company assumed lease agreements for office space in Bedminster and Princeton, NJ.  The Bedminster lease, as extended, expires on March 31, 2022.  Monthly rent expense on this lease is $11.  The Princeton lease, as extended, expired on April 30, 2016.  Monthly rent expense on this lease was $5.  Both leases are subject to escalation clauses, and the Bedminster lease provides for a rent-free period of four months.

In December 2015, the Company extended its lease related to its New York City office space.  The amended lease commenced on October 1, 2017 and expires on September 30, 2028.  The lease is subject to escalation clauses, and provides for a rent-free period of twelve months and for tenant improvements of up to $2,080.  Monthly rent under this extension is $446.

In January 2016, the Company entered into a lease agreement for office space in Princeton, NJ.  The lease commenced April 23, 2016 and expires on August 31, 2022.  This lease replaces the Princeton lease discussed above that expired on April 30, 2016.  Monthly rent expense on this lease is $6.  The lease is subject to escalation clauses, and provides for a rent-free period of five months.

With the Cappiccille Acquisition, the Company assumed a lease agreement for office space in Livingston, NJ.  The lease is month-to-month.  Monthly rent expense is $2.

In January 2018, the Company extended its lease related to its Boston, MA office space.  The amended lease commenced on January 1, 2018 and expires on April 30, 2023.  The lease provides for a rent-free period of one month.  Monthly rent under this extension is $33.

With the Neosho Acquisition, the Company assumed a lease agreement for office space in La Jolla, CA.  The lease expires January 31, 2020.  Monthly rent expense is $3.

Future minimum lease payments and rentals under lease agreements which expire through 2028 are as follows:

The Company has finance leases for certain office equipment. The Company entered into a finance lease agreement for a telephone system during 2014.  The amount financed was $321 and the lease has a term of five years, which began on March 1, 2014.   Monthly minimum lease payments were $5, and continued through November 30, 2018.   On June 30, 2015, the Company assumed certain finance leases for equipment totaling $253 as part of the Jamison Acquisition.  In July 2015, the Company entered into a finance lease for a copier.  The amount financed was $21 and the lease has a term of three years, which began on July 1, 2015.  Monthly minimum lease payments were $1, and continued through June 30, 2018.  In October 2015, the Company entered in a finance lease for a copier.  The amount financed was $18 and the lease has a term of three years, which began on November 1, 2015.  Monthly minimum lease payments were $1, and continued through October 31, 2018.  In January 2017, the Company entered into a finance lease agreement for a copier.  The amount financed was $11 and the lease has a term of two years, which began on January 1, 2017.  Monthly minimum lease payments were $1, and continued through December 31, 2018.  In January 2017, the Company entered into a finance lease agreement for two copiers.  The amount financed was $152 and the lease has a term of five years, which began on February 1, 2017.  Monthly minimum lease payments are $3, and continue through January 31, 2022.  In July 2017, the Company entered into a lease agreement for four copiers.  The amount financed was $72 and the lease has a term of three years, which began on July 1, 2017.  Monthly minimum lease payments are $2, and continue through June 30, 2020.  In March 2018, the Company entered into a lease agreement for a copier.  The amount financed was $11 and the lease has a term of three years, which began on March 1, 2018.  Monthly minimum lease payments are $0.3, and continue through February 28, 2021. The aggregate principal balance of finance leases was $182 and $188 as of March 31, 2019 and December 31, 2018, respectively.

The assets relating to finance leases that are included in equipment as of March 31, 2019 and December 31, 2018 are as follows:

Depreciation expense relating to finance lease assets was $31 and $21 for the three months ended March 31, 2019 and 2018, respectively.  

Future minimum lease payments under finance leases are as follows: