Employee Benefit Plans and Stock-based Compensation - Summary of Company's Stock Option and Restricted Stock Unit Activity (Detail) - $ / shares shares in Thousands	6 Months Ended
	Jul. 01, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Available for Grant, Beginning balance	6,150
Shares Available for Grant, Authorized	2,000
Shares Available for Grant, Granted	(2,890)
Shares Available for Grant, Forfeited or cancelled	1,754
Shares Available for Grant, Ending balance	7,014
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	1,336
Number of Units, exercised	0
Number of Units, Shares released	(1,054)
Number of Units, Forfeited or cancelled	(253)
Number of Units, Ending balance	2,211
Weighted Average Grant Date Fair Value, Beginning balance	$ 6.99
Weighted Average Grant Date Fair Value, Authorized	0
Estimated weighted average fair value per share at purchase date	3.14
Weighted Average Grant Date Fair Value, Exercised	0
Weighted Average Grant Date Fair Value, Shares released	6.72
Weighted Average Grant Date Fair Value, Forfeited or cancelled	5.89
Weighted Average Grant Date Fair Value, Ending balance	$ 4.74
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	886
Number of Shares, Options exercised	(1)
Number of Shares, Forfeited or cancelled	(1,375)
Number of Shares, Ending balance	5,184
Weighted Average Exercise Price, Beginning balance	$ 6.56
Weighted Average Exercise Price, Authorized	0
Weighted Average Exercise Price, Granted	3.15
Weighted Average Exercise Price, Options exercised	2.25
Weighted Average Exercise Price, Forfeited or cancelled	6.43
Weighted Average Exercise Price, Ending balance	$ 6.02