Carrying value as of the balance sheet date of long-term debt (with maturities initially due after one year or beyond the operating cycle if longer) identified as Convertible Notes Payable, excluding current portion. Convertible Notes Payable is a written promise to pay a note which can be exchanged for a specified amount of another, related security, at the option of the issuer and the holder.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Name:	us-gaap_ConvertibleLongTermNotesPayable
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Convertible Debt (Details) - USD ($) $ in Thousands	Sep. 26, 2020	Aug. 21, 2020	Dec. 28, 2019
Debt Disclosure [Line Items]
Debt Instrument, Unamortized Discount	$ 120,494
Convertible senior notes	627,006		$ 0
Convertible Debt
Debt Disclosure [Line Items]
Debt Instrument, Face Amount	$ 747,500	$ 747,500