Commitments - Additional Information (Details) $ in Millions	Oct. 31, 2020 USD ($)
Samsung
Loss Contingencies [Line Items]
Historical cost of inventory	$ 25.5

Fair value portion of inventory expected to be realized or consumed after one year or normal operating cycle, if longer.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

Name:	us-gaap_InventoryNoncurrentFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant