Employee Benefit Plans and Stock-based Compensation - Summary of Company's Stock Option and Restricted Stock Unit Activity (Detail) shares in Thousands	3 Months Ended
	Apr. 01, 2016 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Available for Grant, Beginning balance	6,150
Shares Available for Grant, Authorized	0
Shares Available for Grant, Granted	(2,802)
Shares Available for Grant, Forfeited or cancelled	980
Shares Available for Grant, Ending balance	4,328
Restricted Stock Units Outstanding [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Units, Beginning balance	2,182
Number of Shares, Authorized	0
Number of Units, Granted	1,284
Number of Units, exercised	0
Number of Units, Shares released	(977)
Number of Units, Forfeited or cancelled	(201)
Number of Units, Ending balance	2,288
Weighted Average Grant Date Fair Value, Beginning balance | $ / shares	$ 6.99
Weighted Average Grant Date Fair Value, Authorized | $ / shares	0
Estimated weighted average fair value per share at purchase date | $ / shares	3.15
Weighted Average Grant Date Fair Value, Exercised | $ / shares	0
Weighted Average Grant Date Fair Value, Shares released | $ / shares	6.72
Weighted Average Grant Date Fair Value, Forfeited or cancelled | $ / shares	5.89
Weighted Average Grant Date Fair Value, Ending balance | $ / shares	$ 4.88
Stock Options Outstanding [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares, Beginning balance	5,674
Number of Shares, Authorized	0
Number of Shares, Granted	876
Number of Shares, Options exercised	(1)
Number of Shares, Forfeited or cancelled	(679)
Number of Shares, Ending balance	5,870
Weighted Average Exercise Price, Beginning balance | $ / shares	$ 6.56
Weighted Average Exercise Price, Authorized | $ / shares	0
Weighted Average Exercise Price, Granted | $ / shares	3.14
Weighted Average Exercise Price, Options exercised | $ / shares	2.25
Weighted Average Exercise Price, Forfeited or cancelled | $ / shares	6.38
Weighted Average Exercise Price, Ending balance | $ / shares	$ 6.08