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Consolidated Statements of Stockholders' Equity (Deficit) - USD ($) $ in Thousands | Total | Common Stock [Member] | Additional Paid-In Capital [Member] | Accumulated Other Comprehensive (Loss) Income [Member] | Accumulated Deficit [Member]
--- | --- | --- | --- | --- | ---
Balance at beginning of period (in shares) at Jan. 02, 2015 |  | 195,895,769 |  |  |
Balance at beginning of period at Jan. 02, 2015 | $ (159,324) | $ 196 | $ 1,591,782 | $ (121) | $ (1,751,181)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net income (loss) | (161,744) |  |  |  | (161,744)
Other comprehensive (loss) income | (111) |  |  | (111) |
Sale of shares of common stock, net (in shares) |  | 28,750,000 |  |  |
Sale of shares of common stock, net | 145,649 | $ 29 | 145,620 |  |
Issuance of common stock under equity incentive and stock purchase plans (in shares) |  | 3,315,174 |  |  |
Issuance of common stock under equity incentive and stock purchase plans | 11,277 | $ 3 | 11,274 |  |
Stock-based compensation | 21,977 |  | 21,977 |  |
Warrants transferred from other long-term liabilities | 1,470 |  | 1,470 |  |
Balance at end of period (in shares) at Jan. 01, 2016 |  | 227,960,943 |  |  |
Balance at end 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 (loss) | (70,222) |  |  |  | (70,222)
Other comprehensive (loss) income | (184) |  |  | (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 | 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] |  |  |  |  |
Adoption of Accounting Standards Update No. 2016-09 | 0 |  | 252 |  | (252)
Net income (loss) | 154,227 |  |  |  | 154,227
Other comprehensive (loss) income | 69 |  |  | 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 warrant exercise | 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)

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