Stock-Based Compensation - Schedule of Stock Options Activity (Details) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Apr. 03, 2016 USD ($) $ / shares shares
Number of Shares
Balance outstanding at beginning of period, (in shares) | shares	5,266
Forfeited or expired, (in shares) | shares	(209)
Balance outstanding at end of period, (in shares) | shares	5,057
Exercisable, (in shares) | shares	4,522
Vested and expected to vest, (in shares) | shares	4,968
Weighted Average Exercise Price
Balance outstanding at beginning of period, (in dollars per share) | $ / shares	$ 2.64
Forfeited or expired, (in dollars per share) | $ / shares	2.33
Balance outstanding at end of period, (in dollars per share) | $ / shares	2.66
Exercisable, (in dollars per share) | $ / shares	2.63
Vested and expected to vest, (in dollars per share) | $ / shares	$ 2.65
Weighted Average Remaining Term
Balance outstanding	4 years 3 months 15 days
Exercisable	3 years 9 months 29 days
Vested and expected to vest	4 years 2 months 16 days
Aggregate Intrinsic Value
Balance outstanding | $	$ 66
Exercisable | $	66
Vested and expected to vest | $	$ 66