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Consolidated Statements of Stockholders' Equity (Deficit) - USD ($) $ in Thousands | Total | Common Stock | Additional Paid-in Capital | Accumulated Other Comprehensive Loss | Accumulated Deficit
--- | --- | --- | --- | --- | ---
Balance at beginning of period (in shares) at Jan. 01, 2016 |  |  | 227,960,943 |  |  |
Balance at beginning of period at Jan. 01, 2016 | $ (140,806) |  | $ 228 | $ 1,772,123 | $ (232) | $ (1,912,925)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income | (70,222) |  |  |  |  | (70,222)
Other comprehensive income (loss) | (184) | [1] |  |  | (184) |
Issuance of common stock in settlement of convertible notes (in shares) |  |  | 54,009,279 |  |  |
Issuance of common stock in settlement of convertible notes | 253,080 |  | $ 54 | 253,026 |  |
Issuance of common stock under equity incentive and stock purchase plans (in shares) |  |  | 7,953,576 |  |  |
Issuance of common stock under equity incentive and stock purchase plans | 24,538 |  | $ 8 | 24,530 |  |
Stock-based compensation | 22,912 |  |  | 22,912 |  |
Balance at end of period (in shares) at Dec. 30, 2016 |  |  | 289,923,798 |  |  |
Balance at end of period at Dec. 30, 2016 | 89,318 |  | $ 290 | 2,072,591 | (416) | (1,983,147)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income | 154,227 |  |  |  |  | 154,227
Other comprehensive income (loss) | 69 | [1] |  |  | 69 |
Issuance of common stock under equity incentive and stock purchase plans (in shares) |  |  | 5,408,177 |  |  |
Issuance of common stock under equity incentive and stock purchase plans | 17,409 |  | $ 5 | 17,404 |  |
Issuance of common stock on warrant exercise (in shares) |  |  | 877,451 |  |  |
Issuance of common stock on exercise of warrants | 0 |  | $ 1 | (1) |  |
Stock-based compensation | $ 23,938 |  |  | 23,938 |  |
Balance at end of period (in shares) at Dec. 29, 2017 | 296,209,426 |  | 296,209,426 |  |  |
Balance at end of period at Dec. 29, 2017 | $ 284,961 |  | $ 296 | 2,114,184 | (347) | (1,829,172)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income | 690,070 |  |  |  |  |
Net income | ASU 2016-02 | (500) |  |  |  |  |
Other comprehensive income (loss) | (354) | [1] |  |  | (354) |
Issuance of common stock under equity incentive and stock purchase plans (in shares) |  |  | 3,666,654 |  |  |
Issuance of common stock under equity incentive and stock purchase plans | 13,411 |  | $ 4 | 13,407 |  |
Stock-based compensation | $ 40,626 |  |  | 40,626 |  |
Balance at end of period (in shares) at Dec. 28, 2018 | 299,876,080 |  | 299,876,080 |  |  |
Balance at end of period at Dec. 28, 2018 | $ 1,287,453 |  | $ 300 | $ 2,168,217 | $ (701) | $ (880,363)
[1] | Other comprehensive income (loss) consisted solely of unrealized gains or losses, net, on available-for-sale securities arising during the periods presented. There were nominal or no reclassification adjustments to net income (loss) resulting from realized gains or losses on the sale of securities. During the year ended December 31, 2018, there was a tax benefit of $0.2 million related to other comprehensive income as a result of the release of our valuation allowance for our deferred tax assets; there was no income tax benefit or provision related to other comprehensive income (loss) during the remaining periods presented.

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