Debt and Credit Sources - Non-recourse Debt (Details) - USD ($)	3 Months Ended
	Apr. 02, 2017	Mar. 30, 2014	Jun. 28, 2020	Dec. 29, 2019	Jan. 01, 2017
Debt Instrument [Line Items]
Non-recourse financing arrangements			$ 20,000,000.0
Arizona loan2
Debt Instrument [Line Items]
Non-recourse financing arrangements			5,975,000	$ 6,111,000
Arizona loan2 | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis spread		4.13%
County of San Diego
Debt Instrument [Line Items]
Non-recourse financing arrangements			14,066,000	3,004,000
AUO debt
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity					$ 50,000,000
Non-recourse financing arrangements			34,016,000	37,749,000
AUO debt | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis spread	1.50%
HSBC Financing Program
Debt Instrument [Line Items]
Non-recourse financing arrangements			10,892,000	21,993,000
Other debt
Debt Instrument [Line Items]
Non-recourse financing arrangements			$ 542,000	$ 1,831,000