Lease (Tables)

9 Months Ended

Sep. 27, 2019

The components of lease expense are as follows (in thousands):



	Three months ended		Nine months ended
	September 27, 2019		September 27, 2019
Operating lease cost	$	2,641	$	6,868
Variable lease cost	837		2,360
Total lease cost	$	3,478	$	9,228

Supplemental cash flow information related to leases are as follows (in thousands):



	Three months ended		Nine months ended
	September 27, 2019		September 27, 2019
Cash paid for amounts included in the measurement of operating lease liabilities	$	2,655	$	6,937
ROU assets obtained in exchange for operating lease obligations	$	—	$	10,305

Other information related to leases are as follows:



	Nine months ended
	September 27, 2019
Operating leases
Weighted-average remaining lease term (years)	7.2
Weighted-average discount rate	6.8	%

Future Minimum Lease Payments under non-cancellable Operating Leases

Future minimum lease payments under non-cancelable operating leases as of September 27, 2019 are as follows (in thousands):



Years ending December 31,
2019 (remaining three months)	$	2,795
2020	9,429
2021	5,732
2022	4,360
2023	4,131
Thereafter	20,347
Total future minimum lease payments	$	46,794
Less: imputed interest	(10,954		)
Total	$	35,840

Schedule of Future Minimum Rental Payments for Operating Leases

Future minimum lease payments under non-cancelable operating leases as of December 31, 2018, as defined under the previous lease accounting guidance of ASC Topic 840, were as follows (in thousands):



Years ending December 31,
2019	$	13,515
2020	10,139
2021	4,088
2022	2,523
2023	2,220
Thereafter	6,694
Total future minimum lease payments	$	39,179