5. Leases

The Company has entered into operating leases primarily for commercial buildings. These leases have terms which range from 2 years to 11 years, some of which include options to extend the leases for up to 5 years. There are no economic penalties for the Company to extend the lease, and it is not reasonably certain that the Company will exercise the extension options. Operating lease right-of-use assets and liabilities commencing after January 1, 2019 are recognized at commencement date based on the present value of lease payments over the lease term. The operating leases do not contain material residual value guarantees or material restrictive covenants.

Rent expense, including short-term lease cost, was $1,007 and $675 for the three months ended September 30, 2021 and September 30, 2020, respectively, and $3,099 and $2,183 for the nine months ended September 30, 2021 and September 30, 2020, respectively.

Information related to the Company's right-of-use assets and related operating lease liabilities were as follows: