Convertible Debt Interest Expense (Details) - Convertible Debt $ in Thousands	9 Months Ended
Sep. 26, 2020 USD ($)
Debt Disclosure [Line Items]
Interest Expense, Debt, Excluding Amortization	$ 726
Amortization of Debt Discount (Premium)	2,130
Interest Expense	$ 2,856

Amount of the cost of borrowed funds accounted for as interest expense.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
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-Section 50
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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Name:	us-gaap_InterestExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration