CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 28, 2015	Dec. 27, 2014
Current assets:
Cash and cash equivalents	$ 118,623	$ 86,495
Short-term investments	215,080	239,628
Accounts receivable, net of allowance for doubtful accounts of $20 in 2015 and $38 in 2014	131,224	154,596
Inventory	157,195	146,500
Prepaid expenses and other current assets	23,112	24,636
Total current assets	645,234	651,855
Property, plant and equipment, net	82,661	81,566
Long-term investments	69,835	59,233
Cost-method investment	14,500	14,500
Long-term restricted cash	5,108	5,460
Other non-current assets	5,692	5,402
Total assets	823,030	818,016
Current liabilities:
Accounts payable	50,183	61,533
Accrued expenses	28,061	26,441
Accrued compensation and related benefits	24,406	38,795
Accrued warranty	11,453	12,241
Deferred revenue	36,757	35,321
Total current liabilities	150,860	174,331
Long-term debt, net	118,951	116,894
Accrued warranty, non-current	14,086	14,799
Deferred revenue, non-current	12,119	10,758
Other long-term liabilities	19,179	19,327
Commitments and contingencies (Note 14)
Stockholders’ equity:
Preferred stock, $0.001 par value Authorized shares – 25,000 and no shares issued and outstanding	0	0
Issued and outstanding shares – 129,094 as of March 28, 2015 and 126,160 as of December 27, 2014	129	126
Additional paid-in capital	1,090,676	1,077,225
Accumulated other comprehensive loss	(4,510)	(4,618)
Accumulated deficit	(578,460)	(590,826)
Total stockholders’ equity	507,835	481,907
Total liabilities and stockholders’ equity	$ 823,030	$ 818,016