Leases

9 Months Ended

Sep. 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						Nine Months Ended
	September 30,						September 30,
	2021			2020			2021			2020
Operating lease expense	$	4,396		$	4,356		$	13,028		$	12,982
Short-term lease expense		555			359			1,386			1,223
Variable lease expense		417			312			1,188			1,086
Total lease expense	$	5,368		$	5,027		$	15,602		$	15,291
Other information:
Operating cash flows from operating leases	$	3,914		$	4,250		$	12,362		$	13,203
Right of use assets obtained in exchange for new operating lease obligations	$	1,576		$	2,098		$	6,202		$	4,502
Weighted-average remaining lease term - operating leases	7.94 years			8.68 years			7.94 years			8.68 years
Weighted-average discount rate - operating leases		4.62	%		4.76	%		4.62	%		4.76	%

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


	September 30, 2021
Remainder of 2021	$	3,773
2022		14,264
2023		11,734
2024		9,313
2025		8,119
Thereafter		31,960
Total undiscounted lease payments		79,163
Less: Imputed interest		(13,141	)
Total operating lease liabilities	$	66,022