Stockholders' Equity - Stock Option Valuation Assumptions (Details) - Stock options	12 Months Ended
	Dec. 29, 2019	Dec. 30, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life	10 years	10 years	10 years
Risk-free interest rate, lower range (percent)	2.50%	2.90%	2.20%
Risk-free interest rate, upper range (percent)	2.60%	3.20%	2.50%
Volatility, lower range (percent)	47.50%	52.90%	53.80%
Volatility, upper range (percent)	49.10%	53.40%	55.00%
Forfeiture rate (percent)	5.10%	5.10%	5.00%
Dividend yield (percent)	0.00%	0.00%	0.00%