Leases

12 Months Ended

Dec. 31, 2020

Leases [Abstract]

Leases

7.  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):

	For the Year Ended December 31,
	2020			2019
Operating lease expense	$	17,848		$	18,639
Short-term lease expense		1,801			1,228
Variable lease expense		1,442			920
Total lease expense	$	21,091		$	20,787
Other Information:
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	17,049		$	18,195
Right-of-use assets obtained in exchange for new lease obligations:
Operating leases	$	5,654			11,688
Weighted-average remaining lease term - operating leases	8.69 years			9.07 years
Weighted-average discount rate - operating leases		4.70	%		4.94	%

Scheduled undiscounted lease payments for non-cancellable leases consist of the following (in thousands):

	December 31, 2020
2021	$	13,769
2022		12,062
2023		10,301
2024		8,123
2025		7,040
Thereafter		31,156
Total undiscounted lease payments	$	82,451
Less: Imputed interest		(14,906	)
Total lease liabilities	$	67,545

During the year ended December 31, 2020, the Company recorded a net loss on lease abandonment of $0.5 million, for certain properties that ceased in use and are expected to provide no future economic benefits.