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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Jan. 01, 2017 | Jan. 03, 2016
Income Statement [Abstract] |  |  |
Revenue | $ 12,149 | $ 11,421 | $ 18,956
Cost of revenue | 6,627 | 7,648 | 11,411
Gross profit | 5,522 | 3,773 | 7,545
Operating expenses: |  |  |
Research and development | 9,572 | 12,265 | 14,144
Selling, general and administrative | 9,900 | 10,310 | 10,619
Restructuring costs | 0 | 0 | 295
Loss from operations | (13,950) | (18,802) | (17,513)
Interest expense | (115) | (175) | (82)
Interest income and other expense, net | 21 | (106) | (107)
Income (loss) before income taxes | (14,044) | (19,083) | (17,702)
Provision for income taxes | 87 | 65 | 146
Net loss | $ (14,131) | $ (19,148) | $ (17,848)
Net loss per share: |  |  |
Basic (in dollars per share) | $ (0.18) | $ (0.29) | $ (0.32)
Diluted (in dollars per share) | $ (0.18) | $ (0.29) | $ (0.32)
Weighted average shares: |  |  |
Basic (in shares) | 77,291 | 65,377 | 56,472
Diluted (in shares) | 77,291 | 65,377 | 56,472

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