Leases

9 Months Ended

Sep. 30, 2019

14. LEASES

We have operating leases primarily consisting of offices and lab space, machinery and equipment and vehicles. The components of lease expense are as follows (in thousands):

	Three months ended			Nine months ended
	September 30, 2019			September 30, 2019
Lease Cost
Operating lease cost	$	4,724		$	14,027
Short-term lease cost		402			1,024
Variable lease cost		162			521
Total lease cost	$	5,288		$	15,572

Other Information
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	4,306		$	13,729
Right-of-use assets obtained in exchange for new lease obligations:
Operating leases	$	3,837		$	11,066
Weighted-average remaining lease term- operating leases	9.18 years			9.18 years
Weighted-average discount rate - operating leases		4.95	%		4.95	%

Scheduled undiscounted cash flows for non-cancellable leases at September 30, 2019 consist of the following (in thousands):

	Operating Leases
Remainder of 2019	$	4,132
2020		14,566
2021		12,130
2022		10,754
2023		9,193
Thereafter		43,842
Total undiscounted lease payments	$	94,617
Less: Imputed Interest		(18,994	)
Total lease liabilities	$	75,623

We adopted ASU 2017-06 using the cumulative effect transition method on January 1, 2019. As required, the following disclosure is provided for periods prior to adoption. Scheduled minimum rental commitments under non-cancellable operating leases at December 31, 2018, consist of the following (in thousands):

	Operating Leases
2019	$	16,267
2020		12,572
2021		9,774
2022		7,955
2023		4,938
Thereafter		14,815
Total commitments	$	66,321

The Company has elected to apply the short-term lease exemption to all of its classes of underlying assets. Accordingly, no ROU asset or lease liability is recognized for leases with a term of twelve months or less.

The Company has elected to apply the practical expedient for combining lease and non-lease components for vehicle leases and elected not to apply the practical expedient for combining lease and non-lease components to all other classes of underlying assets.