Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Jun. 28, 2014	Dec. 28, 2013
Current assets:
Cash and cash equivalents	$ 69,859	$ 59,196
Marketable securities	79,182	91,895
Accounts receivable, net	41,962	30,189
Inventories, net	22,050	20,707
Deferred tax assets	2,841	2,776
Refundable income taxes	782	782
Prepaid expenses and other current assets	7,476	6,106
Total current assets	224,152	211,651
Restricted cash	435	435
Property, plant and equipment, net	29,210	35,190
Goodwill	30,731	30,731
Intangibles, net	47,326	57,470
Deferred tax assets	3,983	3,960
Other assets	1,291	1,271
Total assets	337,128	340,708
Current liabilities:
Accounts payable	18,388	16,313
Accrued liabilities	17,205	13,985
Capital leases, current portion	0	270
Income taxes payable	493	172
Deferred revenue	7,238	7,030
Total current liabilities	43,324	37,770
Long-term income taxes payable	2,318	2,497
Deferred tax liabilities	3,029	3,029
Deferred rent and other liabilities	3,443	3,326
Total liabilities	52,114	46,622
Commitments and contingencies (Note 17)
Stockholders’ equity:
10,000,000 shares authorized; no shares issued and outstanding at June 28, 2014 and December 28, 2013, respectively	0	0
250,000,000 shares authorized; 56,112,677 and 54,649,600 shares issued and outstanding at June 28, 2014 and December 28, 2013, respectively	56	55
Additional paid-in capital	703,133	695,631
Accumulated other comprehensive gain (loss)	213	(249)
Accumulated deficit	(418,388)	(401,351)
Total stockholders’ equity	285,014	294,086
Total liabilities and stockholders’ equity	$ 337,128	$ 340,708