Share-Based Compensation, Common Stock Issuances and Common Stock Schedule of Options Outstanding (Details) - $ / shares	12 Months Ended
	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
Total Options
Outstanding, beginning balance (in shares)	3,522,302
Options, granted (in shares)	2,620,253
Options, exercised (in shares)	(192,878)
Options, forfeited (in shares)	(155,181)
Options, performance adjustment (in shares)	(308,759)
Outstanding, ending balance (in shares)	5,485,737	3,522,302
Outstanding, vested and exercisable (in shares)	2,184,896
Weighted- Average Fair Value
Average Fair Value, Outstanding, beginning balance (in USD per share)	$ 10.03
Average Fair Value, Granted (in USD per share)	3.91	$ 10.63	$ 14.55
Average Fair Value, Exercised (in USD per share)	6.87
Average Fair Value, Forfeited (in USD per share)	7.91
Average Fair Value, Performance Adjustment (in USD per share)	17.65
Average Fair Value, Outstanding, ending balance (in USD per share)	6.85	10.03
Average Fair Value, Vested and Exercisable (in USD per share)	9.09
Weighted- Average Exercise Price
Average Exercise Price, Outstanding, beginning balance (in USD per share)	26.62
Average Exercise Price, Granted (in USD per share)	13.29
Average Exercise Price, Exercised (in USD per share)	16.19
Average Exercise Price, Forfeited (in USD per share)	24.01
Average Exercise Price, Performance Adjustment (in USD per share)	19.47
Average Exercise Price, Outstanding, ending balance (in USD per share)	21.10	$ 26.62
Average Exercise Price, Vested and Exercisable (in USD per share)	$ 25.83
Weighted- Average Remaining Contractual Years
Remaining contractual term, Outstanding	7 years 8 months 12 days
Remaining contractual term, Vested and Exercisable	5 years 9 months 18 days
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average recognition period	2 years
Time Options
Total Options
Outstanding, beginning balance (in shares)	2,770,850
Options, granted (in shares)	2,620,253
Options, exercised (in shares)	(122,081)
Options, forfeited (in shares)	(142,114)
Options, performance adjustment (in shares)	0
Outstanding, ending balance (in shares)	5,126,908	2,770,850
Outstanding, vested and exercisable (in shares)	1,826,067
Performance Options
Total Options
Outstanding, beginning balance (in shares)	751,452
Options, granted (in shares)	0
Options, exercised (in shares)	(70,797)
Options, forfeited (in shares)	(13,067)
Options, performance adjustment (in shares)	(308,759)
Outstanding, ending balance (in shares)	358,829	751,452
Outstanding, vested and exercisable (in shares)	358,829