Income Taxes - Deferred Tax Assets (Details) - USD ($) $ in Thousands	Jan. 01, 2023	Jan. 02, 2022
Deferred tax assets:
Net operating loss carryforwards	$ 85,288	$ 163,436
Tax credit carryforwards	24,870	52,678
Reserves and accruals	39,239	60,208
Stock-based compensation stock deductions	4,675	3,187
Basis difference on third-party project sales	28,658	35,013
Identified intangible assets	13,002	5,644
Other	1,806	2,131
Total deferred tax assets	197,538	322,297
Valuation allowance	(121,720)	(173,481)
Total deferred tax assets, net of valuation allowance	75,818	148,816
Deferred tax liabilities:
Fixed asset basis difference	(18,713)	(15,031)
Investments	(36,456)	(118,885)
Other	(21,163)	(29,697)
Total deferred tax liabilities	(76,332)	(163,613)
Net deferred tax liabilities	$ (514)	$ (14,797)