Commitments (Tables)

6 Months Ended

Jun. 30, 2019

Commitments And Contingencies Disclosure [Abstract]

Summary of Lease Arrangements of Company Facilities

The Company has lease arrangements for its facilities in California and Alabama as follows.    

Location	Approximate Square Feet	Operation	Expiration
Cupertino, CA	30,149 sq. ft.	Office, Laboratory and Manufacturing	Lease expires 2024 (with an option to renew for an additional five years)
Cupertino, CA	20,100 sq. ft.	Office and Laboratory	Lease expires 2024 (with an option to renew for an additional five years)
Vacaville, CA	24,634 sq. ft.	Manufacturing	Lease expires 2023
Birmingham, AL	21,540 sq. ft.	Office, Laboratory and Manufacturing	Lease expires 2021 (with two options to renew the lease term for an additional five years each after the current lease expires)

Schedule of Future Operating Lease Minimum Payments

Future minimum payments under these noncancelable leases are as follows (in thousands):

	Operating Leases
Six months ended December 31, 2019	$	1,072
2020		2,200
2021		2,126
2022		1,991
Thereafter		2,245
	$	9,634