Stockholders' Equity - Stock Option Activity (Details) $ / shares in Units, shares in Thousands, $ in Thousands	9 Months Ended
	Oct. 03, 2020 USD ($) $ / shares shares
Number of Shares Subject to Stock Options
Balance, beginning of period (in shares) | shares	12,871
Granted (in shares) | shares	0
Exercised (in shares) | shares	(1,469)
Forfeited or canceled (in shares) | shares	(147)
Balance, end of period (in shares) | shares	11,255
Stock options vested and expected to vest (in shares) | shares	11,255
Stock options exercisable (in shares) | shares	11,255
Weighted– Average Exercise Price
Balance, weighted average exercise price, beginning of period (in dollars per share) | $ / shares	$ 3.51
Granted, weighted average exercise price (in dollars per share) | $ / shares
Exercised, weighted average exercise price (in dollars per share) | $ / shares	2.04
Forfeited or canceled, weighted average exercise price (in dollars per share) | $ / shares	6.96
Balance, weighted average exercise price, end of period (in dollars per share) | $ / shares	3.66
Stock options vested and expected to vest (in dollars per share) | $ / shares	3.66
Stock options exercisable (in dollars per share) | $ / shares	$ 3.66
Aggregate Intrinsic Value | $	$ 40,248
Stock options vested and expected to vest | $	40,248
Stock options exercisable | $	$ 40,248