Stockholders' Equity - Employee Stock Purchase Plan (Details) - $ / shares	12 Months Ended
	Dec. 29, 2019	Dec. 30, 2018	Dec. 31, 2017	May 31, 2017	Mar. 28, 2014	Mar. 27, 2014	Aug. 31, 1999
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for future issuance (in shares)					1,550,000	2,306,256
Number of shares issued under the plan (in shares)	356,000
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)				3,000,000			5,200,000
Minimum weekly employment threshold to qualify for ESPP	20 hours
Minimum annual employment threshold to qualify for ESPP	5 months
Maximum percentage of employee compensation eligible to purchase shares under ESPP (percent)	15.00%
Purchase price of common stock as a percent of fair market value (percent)	85.00%
Cumulative number of shares issued under ESPP (in shares)	5,500,000
Number of shares available for future issuance (in shares)	2,700,000
Average share price of shares issued under the plan (dollars per share)	$ 10.79
Assumptions and resulting fair values of options granted
Expected term (in years)	15 days	15 days	15 days
Risk-free interest rate, lower range (percent)	2.09%	1.53%	0.62%
Risk-free interest rate, upper range (percent)	2.56%	2.11%	1.14%
Expected volatility, lower range (percent)	37.22%	40.24%	44.38%
Expected volatility, upper range (percent)	43.70%	44.83%	53.70%
Expected dividend yield (percent)	0.00%	0.00%	0.00%
Weighted average grant-date fair value per share (in dollars per share)	$ 4.74	$ 3.03	$ 2.51