Leases Lease Arrangement (Details) - San Jose facility	Apr. 30, 2020 USD ($) ft²
Lessee, Lease, Description
Total space under lease (in square feet) | ft²	90,000
Lessee, operating lease, term of contract	128 months
Lessee, operating lease, variable rate, beginning of lease	$ 3.26
Lessee, operating lease, variable rate, end of lease	$ 4.38
Lessee, operating lease, renewal term	60 months
Lessee, operating lease, total required lease payments	$ 41,000,000
Total reimbursement receivable under lease agreement	$ 9,000,000.0