14. Commitments and Contingencies Operating Leases The Company leases office space and equipment under certain non-cancelable operating lease agreements. Rental expense for the years ended December 31, 2017 and 2016 was approximately $ 2,400,000 for both periods. See Note 15 for related party rental expense amounts. As of December 31, 2017, the future minimum rental payments under non-cancelable operating leases were approximately as follows: Years ending December 31, Amount 2018 $ 3,638,000 2019 3,056,000 2020 2,523,000 2021 1,533,000 2022 613,000 Thereafter 884,000 Total $ 12,247,000 Equipment Subject to Capital Lease In January 2016, NMM entered into a lease for certain computer equipment. Under the terms of the lease agreement NMM had the option to purchase the equipment at the end of the original two year lease term for $ 1 (bargain purchase option). In accordance with relevant accounting guidance the lease was classified as a capital lease. The lease required monthly payments of $ 8,050 through December 30, 2017 and bore interest at the rate of 3.625 % per annum. The obligation of this capital lease was paid off in 2017. In January 2015, NMM entered into a lease for certain phone equipment. Under the terms of the lease agreement NMM was obligated to purchase the equipment at the end of the original two year lease term for $ 1 (bargain purchase option). In accordance with relevant accounting guidance the lease was classified as a capital lease. The lease required monthly payments of $ 7,641 through January 1, 2017 and bore interest at the rate of 3.625 % per annum. The obligation of this capital lease was paid off in 2016. In September 2017, ICC entered into a lease for medical equipment. In accordance with relevant accounting guidance the lease is classified as a capital lease. The lease requires monthly payments of $ 9,910 through August 2024 and bears interest at the rate of 3.00 % per annum. The following is a schedule of future minimum lease payments on the non-cancelable capital lease as of December 31