Stockholders' Equity - Summary of Stock Option Activity (Details) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 30, 2017 USD ($) $ / shares shares
Shares
Beginning balance, Shares | shares	12,566
Granted, Shares | shares	3,732
Exercised, Shares | shares	(1,803)
Forfeited or expired, Shares | shares	(1,556)
Ending balance, Shares | shares	12,939
Vested and expected to vest at end of period, Shares | shares	12,939
Exercisable at end of period, Shares | shares	6,601
Weighted average exercise price
Beginning balance (dollars per share) | $ / shares	$ 5.70
Granted (dollars per share) | $ / shares	5.73
Exercised (dollars per share) | $ / shares	5.07
Forfeited or expired (dollars per share) | $ / shares	6.00
Ending balance (dollars per share) | $ / shares	5.77
Vested and expected to vest at end of period, Weighted average exercise price (dollars per share) | $ / shares	5.77
Exercisable at end of period, Weighted average exercise price (dollars per share) | $ / shares	$ 5.81
Total
Vested and expected to vest at end of period, Weighted average remaining contractual term	4 years 5 months 20 days
Vested and expected to vest at end of period, aggregate intrinsic value | $	$ 3,333
Exercisable at end of period, Weighted average remaining contractual term	2 years 10 months 14 days
Exercisable at end of period, aggregate intrinsic value | $	$ 2,485