Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 29, 2014	Dec. 29, 2013
CURRENT ASSETS:
Cash and cash equivalents	$ 257,557	$ 290,089
Short-term investments	53,030	18,014
Accounts receivable	8,941	5,176
Inventories	18,652	12,979
Prepaid expenses and other current assets	5,942	4,192
Total current assets	344,122	330,450
PROPERTY AND EQUIPMENT — Net	58,217	24,613
OTHER NON-CURRENT ASSETS	990	1,024
Total assets	403,329	356,087
CURRENT LIABILITIES:
Accounts payable	59,215	55,607
Accrued expenses	29,989	30,773
Deferred revenue	47,659	23,250
Total current liabilities	136,863	109,630
NON-CURRENT LIABILITIES	11,087	4,254
Total liabilities	147,950	113,884
COMMITMENTS AND CONTINGENCIES (Note 3 and Note 4)
STOCKHOLDERS’ EQUITY
Preferred stock, $0.0001 par value—2,000,000 shares authorized as of June 29, 2014 and December 29, 2013; zero issued and outstanding as of June 29, 2014 and December 29, 2013	0	0
Additional paid-in capital	295,760	287,385
Accumulated other comprehensive loss	(63)	(58)
Accumulated deficit	(40,330)	(45,136)
Total stockholders’ equity	255,379	242,203
Total liabilities and stockholders' equity	403,329	356,087
Class A Common Stock [Member]
STOCKHOLDERS’ EQUITY
Common stock	3	1
Class B Common Stock [Member]
STOCKHOLDERS’ EQUITY
Common stock	$ 9	$ 11