CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Sep. 27, 2014	Dec. 28, 2013
Current assets:
Cash and cash equivalents	$ 110,864	$ 124,330
Short-term investments	206,713	172,660
Accounts receivable, net of allowance for doubtful accounts of $20 in 2014 and $43 in 2013	136,085	100,643
Inventory	130,833	123,685
Prepaid expenses and other current assets	21,714	17,752
Total current assets	606,209	539,070
Property, plant and equipment, net	74,964	79,668
Long-term investments	55,886	64,419
Cost-method investment	14,500	9,000
Long-term restricted cash	4,224	3,904
Other non-current assets	5,309	4,865
Total assets	761,092	700,926
Current liabilities:
Accounts payable	51,456	39,843
Accrued expenses	23,593	22,431
Accrued compensation and related benefits	29,632	33,899
Accrued warranty	12,736	12,374
Deferred revenue	24,386	32,402
Total current liabilities	141,803	140,949
Long-term debt, net	114,888	109,164
Accrued warranty, non-current	15,070	10,534
Deferred revenue, non-current	8,633	4,888
Other long-term liabilities	18,741	17,581
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 – 125,267 as of September 27, 2014 and 119,887 as of December 28, 2013	125	120
Additional paid-in capital	1,064,723	1,025,661
Accumulated other comprehensive loss	(3,655)	(3,486)
Accumulated deficit	(599,236)	(604,485)
Total stockholders’ equity	461,957	417,810
Total liabilities and stockholders’ equity	$ 761,092	$ 700,926