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Quarterly Results (unaudited) - Schedule of Quarterly Results (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 30, 2017 | Sep. 30, 2017 | Jul. 01, 2017 | Apr. 01, 2017 | Dec. 31, 2016 | Oct. 01, 2016 | Jul. 02, 2016 | Apr. 02, 2016 | Dec. 30, 2017 | Dec. 31, 2016 | Jan. 02, 2016
Quarterly Financial Information Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |  |
Total revenues | $ 10,243 | $ 10,865 | $ 10,002 | $ 10,483 | $ 12,530 | $ 9,789 | $ 11,908 | $ 11,931 | $ 41,593 | $ 46,158 | $ 41,757
Cost of revenues | 8,073 | 6,492 | 5,507 | 6,018 | 6,967 | 5,544 | 6,174 | 6,634 | 26,090 | 25,319 | 21,804
Gross profit | 2,170 | 4,373 | 4,495 | 4,465 | 5,563 | 4,245 | 5,734 | 5,297 | 15,503 | 20,839 | 19,953
Operating expenses: |  |  |  |  |  |  |  |  |  |  |
Research and development | 1,278 | 1,428 | 1,528 | 1,496 | 1,358 | 1,256 | 1,392 | 1,359 | 5,730 | 5,365 | 5,214
Sales and marketing | 4,195 | 3,769 | 3,654 | 2,923 | 3,069 | 2,378 | 2,405 | 2,429 | 14,541 | 10,281 | 8,901
General and administrative | 1,880 | 2,422 | 2,054 | 1,904 | 2,092 | 1,858 | 2,331 | 1,357 | 8,260 | 7,638 | 5,550
Gain on sale of intellectual property |  | (175) |  |  |  |  |  |  | (175) |  |
Impairment of long-lived assets | 35 |  |  |  | 120 |  |  |  | 35 | 120 |
Total operating expenses | 7,388 | 7,444 | 7,236 | 6,323 | 6,639 | 5,492 | 6,128 | 5,145 | 28,391 | 23,404 | 19,665
(Loss) income from operations | (5,218) | (3,071) | (2,741) | (1,858) | (1,076) | (1,247) | (394) | 152 | (12,888) | (2,565) | 288
Other expense, net | (88) | (16) | (1) | (2) | (8) | (51) | (21) | (11) | (107) | (91) | 3
(Loss) income from operations before (benefit from) provision for income taxes | (5,306) | (3,087) | (2,742) | (1,860) | (1,084) | (1,298) | (415) | 141 | (12,995) | (2,656) | 291
Provision for (benefit from) income taxes | (151) | 9 | 8 | 6 | 9,731 | (627) | (87) | 40 | (128) | 9,057 | (183)
Net (loss) income | $ (5,155) | $ (3,096) | $ (2,750) | $ (1,866) | $ (10,815) | $ (671) | $ (328) | $ 101 | $ (12,867) | $ (11,713) | $ 474
Net income (loss) per share: |  |  |  |  |  |  |  |  |  |  |
Basic | $ (0.44) | $ (0.27) | $ (0.24) | $ (0.16) | $ (1.04) | $ (0.07) | $ (0.03) | $ 0.01 | $ (1.11) | $ (1.15) | $ 0.05
Diluted | $ (0.44) | $ (0.27) | $ (0.24) | $ (0.16) | $ (1.04) | $ (0.07) | $ (0.03) | $ 0.01 | $ (1.11) | $ (1.15) | $ 0.05

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