Commitments and Contingencies - Narrative (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | |||
---|---|---|---|---|---|
Jul. 01, 2018 |
Jul. 02, 2017 |
Jul. 01, 2018 |
Jul. 02, 2017 |
Dec. 31, 2017 |
|
Purchase Commitment, Excluding Long-term Commitment [Line Items] | |||||
Purchase obligations due within next twelve months | $ 1,300 | $ 1,300 | |||
Total rent expense, net of sublease income | 239 | $ 210 | $ 477 | $ 421 | |
Primary facility lease | |||||
Purchase Commitment, Excluding Long-term Commitment [Line Items] | |||||
Operating lease expiration date | 2020-03 | ||||
Wafer and finished goods inventory | |||||
Purchase Commitment, Excluding Long-term Commitment [Line Items] | |||||
Outstanding commitment for purchases | 67 | $ 67 | $ 1,100 | ||
Other goods and services | |||||
Purchase Commitment, Excluding Long-term Commitment [Line Items] | |||||
Total outstanding purchase obligations | $ 1,600 | $ 1,600 |