Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 27, 2015	Dec. 27, 2014
Current assets:
Cash and cash equivalents	$ 137,088	$ 113,940
Marketable securities	41,668	49,897
Accounts receivable, net	43,979	45,152
Inventories, net	24,247	25,548
Deferred tax assets	2,030	2,036
Refundable income taxes	0	782
Prepaid expenses and other current assets	7,602	6,919
Total current assets	256,614	244,274
Restricted cash	435	435
Property, plant and equipment, net	24,485	25,498
Goodwill	30,731	30,731
Intangibles, net	32,187	38,689
Deferred tax assets	3,437	3,466
Other assets	864	1,150
Total assets	348,753	344,243
Current liabilities:
Accounts payable	21,449	20,274
Accrued liabilities	19,660	21,217
Income taxes payable	180	68
Deferred revenue	5,766	6,303
Total current liabilities	47,055	47,862
Long-term income taxes payable	902	1,094
Deferred tax liabilities	2,208	2,208
Deferred rent and other liabilities	3,580	3,643
Total liabilities	$ 53,745	$ 54,807
Commitments and contingencies (Note 16)
Stockholders’ equity:
Preferred stock, $0.001 par value: 10,000,000 shares authorized; no shares issued and outstanding at June 27, 2015 and December 27, 2014, respectively	$ 0	$ 0
Common stock, $0.001 par value: 250,000,000 shares authorized; 58,368,157 and 56,518,428 shares issued and outstanding at June 27, 2015 and December 27, 2014, respectively	58	57
Additional paid-in capital	715,863	711,676
Accumulated other comprehensive loss	(1,998)	(1,761)
Accumulated deficit	(418,915)	(420,536)
Total stockholders’ equity	295,008	289,436
Total liabilities and stockholders’ equity	$ 348,753	$ 344,243