Leases

6 Months Ended

Jun. 30, 2021

6. 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						Six Months Ended
	June 30,						June 30,
	2021			2020			2021			2020
Operating lease expense	$	4,283		$	4,286		$	8,632		$	8,629
Short-term lease expense		460			402			831			864
Variable lease expense		339			351			771			771
Total lease expense	$	5,082		$	5,039		$	10,234		$	10,264
Other information:
Operating cash flows from operating leases	$	4,329		$	4,431		$	8,198		$	8,942
Right of use assets obtained in exchange for new operating lease obligations	$	1,237		$	(728	)	$	3,649		$	3,008
Weighted-average remaining lease term - operating leases	8.14 years			8.71 years			8.14 years			8.71 years
Weighted-average discount rate - operating leases		4.66	%		4.90	%		4.66	%		4.90	%

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


	June 30, 2021
Remainder of 2021	$	7,205
2022		13,613
2023		11,392
2024		9,035
2025		7,903
Thereafter		31,635
Total undiscounted lease payments		80,783
Less: Imputed interest		(13,512	)
Total operating lease liabilities	$	67,271