Operating lease ROU assets and liabilities are recognized at the commencement date based on the present value of lease payments over the lease term. For purposes of calculating operating lease ROU assets and operating lease liabilities, we use the non-cancellable lease term plus options to extend that we are reasonably certain to take. Lease expense for operating lease payments is recognized on a straight-line basis over the lease term. Our leases generally do not provide an implicit rate. As such, we use our incremental borrowing rate based on the information available at commencement date in determining the present value of lease payments.

We lease facilities under various non-cancellable operating leases expiring through 2025. In addition to base rental payments, we are generally responsible for our proportionate share of operating expenses, including facility maintenance, insurance, and property taxes. As these amounts are variable, they are not included in lease liabilities. As of March 27, 2020, we had no operating leases executed for which the rental period had not yet commenced.

Three Months Ended

March 27,

2020

March 29,

2019

Operating lease cost

1,320

1,633

	Three Months Ended
	March 27, 2020		March 29, 2019
Cash paid for amounts included in the measurement of lease liabilities:	$	1,284	$	1,164
Operating cash flows from operating leases
Weighted-average remaining lease term of operating leases	2.9 years		3.8 years
Weighted-average discount rate of operating leases	4.5%		4.5%

Future minimum lease payments under non-cancelable leases as of March 27, 2020 are as follows:

2020, remaining	$	4,122
2021		4,830
2022		4,058
2023		1,163
2024		192
Thereafter		26
Total future minimum lease payments		14,391
Less imputed interest		(997	)
Total lease liabilities	$	13,394