The Company determines if an arrangement is a lease at inception. Operating leases are included in operating lease right-of-use (ROU) assets and operating lease liabilities in the condensed consolidated balance sheets.

ROU assets represent the right to use an underlying asset for the lease term and lease liabilities represent the obligation to make lease payments arising from the lease. Operating lease ROU assets and liabilities are recognized at the commencement date based on the present value of lease payments over the lease term. As the Company’s leases do not provide an implicit rate, the Company uses its incremental borrowing rate based on the information available at the commencement date in determining the present value of lease payments. The incremental borrowing rate was 5.1%. Lease expense for lease payments is recognized on a straight-line basis over the lease term. Some of the Company’s leases include options to extend or terminate the lease. The Company includes these options in the recognition of the Company’s ROU assets and lease liabilities when it is reasonably certain that the Company will exercise the option.

The Company has operating leases for its corporate office and certain equipment, which expire no later than December 31, 2022. The leases have a weighted average remaining term of 3.2 years. Maturities of lease liabilities for the years ending December 31 are:

2019	$	141,309
2020		764,555
2021		840,498
2022		823,403
Total lease payments		2,569,765
Less: imputed interest		(204,976	)
Total	$	2,364,789

The amortization of the ROU assets for the three and nine months ended September 30, 2019 was $140,245 and $506,855, respectively.

Prior to January 1, 2019, the Company accounted for its leases in accordance with ASC Topic 840, Leases. At December 31, 2018, the Company was committed under operating leases for its corporate office and certain equipment. As previously disclosed in the Annual Report and under previous lease accounting guidance, future minimum lease payments under non-cancelable operating leases as of December 31, 2018 totaled $2,885,594, comprised of $705,606 for 2019, $731,541 for each of 2020 and 2021, and $716,906 for 2022.