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Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified | Sep. 27, 2014 | Dec. 28, 2013
--- | --- | ---
Current assets: |  |
Cash and cash equivalents | $ 148,424 | $ 165,404
Short term investments | 38,336 | 21,954
Accounts receivable, net of allowance of $67 at September 27, 2014 and December 28, 2013 | 68,347 | 39,348
Unbilled revenue | 1,179 | 856
Inventory | 54,148 | 46,107
Deferred tax assets | 20,962 | 20,144
Other current assets | 12,255 | 6,848
Total current assets | 343,651 | 300,661
Property and equipment, net | 26,862 | 23,661
Deferred tax assets | 10,948 | 10,095
Goodwill | 48,751 | 48,751
Finite-Lived Intangible Assets, Net | 20,019 | 22,668
Other assets | 10,501 | 10,501
Total assets | 460,732 | 416,337
Current liabilities: |  |
Accounts payable | 46,386 | 41,344
Accrued expenses | 17,831 | 14,880
Employee-related Liabilities, Current | 11,770 | 19,606
Deferred Revenue, Current | 2,709 | 5,085
Total current liabilities | 78,696 | 80,915
Long term liabilities | 4,266 | 4,733
Commitments and contingencies (Note 6) |  |
Redeemable convertible preferred stock, 5,000,000 shares authorized and none outstanding | 0 | 0
Common stock, $0.01 par value, 100,000,000 shares authorized; 29,599,356 and 28,935,253 shares issued and outstanding at September 27, 2014 and December 28, 2013, respectively | 296 | 289
Additional paid-in capital | 246,003 | 227,175
Retained earnings | 131,495 | 103,078
Accumulated other comprehensive income | (24) | 147
Total stockholders' equity | 377,770 | 330,689
Total liabilities, redeemable convertible preferred stock and stockholders' equity | $ 460,732 | $ 416,337

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