Condensed Consolidated Balance Sheets (USD $) In Thousands | Sep. 24, 2011 | Dec. 31, 2010 |
|---|
| Assets | | |
| Cash and cash equivalents | $ 30,249 | $ 66,304 |
| Marketable securities | 2,014 | 32,020 |
| Restricted cash | 1,054 | |
| Accounts receivable, net | 47,901 | 43,377 |
| Inventory | 44,152 | 24,557 |
| Deferred cost of revenue | 8,932 | 7,771 |
| Prepaids and other current assets | 6,493 | 3,245 |
| Total current assets | 140,795 | 177,274 |
| Property and equipment, net | 17,222 | 11,815 |
| Goodwill | 116,175 | 65,576 |
| Intangible assets, net | 84,643 | 515 |
| Other assets | 2,273 | 2,376 |
| Total assets | 361,108 | 257,556 |
| Liabilities and stockholders' equity | | |
| Accounts payable | 11,942 | 10,268 |
| Accrued liabilities | 39,450 | 25,987 |
| Deferred revenue | 19,448 | 14,062 |
| Total current liabilities | 70,840 | 50,317 |
| Long-term portion of deferred revenue | 12,265 | 10,985 |
| Other long-term liabilities | 1,662 | 951 |
| Total liabilities | 84,767 | 62,253 |
| Commitments and contingencies (Note 8) | | |
| Stockholders' equity: | | |
| Preferred stock, $0.025 par value; 5,000 shares authorized; no shares issued and outstanding as of September 24, 2011 and December 31, 2010 | | |
| Common stock, $0.025 par value; 100,000 shares authorized; 47,290 and 38,712 shares issued and outstanding as of September 24, 2011 and December 31, 2010 | 1,182 | 968 |
| Additional paid-in capital | 734,045 | 605,939 |
| Other comprehensive income | 85 | 31 |
| Accumulated deficit | (458,971) | (411,635) |
| Total stockholders' equity | 276,341 | 195,303 |
| Total liabilities and stockholders' equity | $ 361,108 | $ 257,556 |