Organization and Summary of Significant Accounting Policies - Property, Plant and Equipment (Details)	12 Months Ended
	Jan. 01, 2023
Solar Power Systems Leased
Property, Plant and Equipment [Line Items]
Useful life	20 years
Leasehold improvements | Minimum
Property, Plant and Equipment [Line Items]
Useful life	1 year
Leasehold improvements | Maximum
Property, Plant and Equipment [Line Items]
Useful life	20 years
Testing equipment and tools | Minimum
Property, Plant and Equipment [Line Items]
Useful life	2 years
Testing equipment and tools | Maximum
Property, Plant and Equipment [Line Items]
Useful life	10 years
Computer equipment | Minimum
Property, Plant and Equipment [Line Items]
Useful life	2 years
Computer equipment | Maximum
Property, Plant and Equipment [Line Items]
Useful life	7 years
Solar power systems
Property, Plant and Equipment [Line Items]
Useful life	30 years
Furniture and fixtures | Minimum
Property, Plant and Equipment [Line Items]
Useful life	3 years
Furniture and fixtures | Maximum
Property, Plant and Equipment [Line Items]
Useful life	5 years