8. Leases

The Company leases certain equipment and buildings under operating lease arrangements. Most leases are for a fixed term and for a fixed amount; additionally, the Company leases certain buildings under operating leases on a month-to-month basis. The Company is not a party to any leases that have step rent provisions, escalation clauses, capital improvement funding or payment increases based on any index or rate.

Future minimum payments under non-cancelable operating leases with initial or remaining terms in excess of one year during each of the next five years follow:

2018	$	2,178,480
2019		1,538,397
2020		1,193,329
2021		704,929
2022		202,943
	$	5,818,078

Rent expense for all operating leases was $2,166,755 in 2017, $1,293,271 in 2016, and $1,324,365 in 2015. The Company expects future rent expense, including non-cancelable operating leases, leases that are expected to be renewed and buildings leased on a month-to-month basis, for each of the next five years to be in the range of $2,200,000 to $2,500,000.