Note 12 - Segment and Geographical Information - Net Revenue to Each Significant Country Based on the Ship-to Location (Details) - USD ($) $ in Thousands |
3 Months Ended | |
|---|---|---|
Apr. 29, 2017 |
Apr. 30, 2016 |
|
| Sales revenue, net | $ 39,564 | $ 53,775 |
| CHINA | ||
| Sales revenue, net | 21,790 | 27,457 |
| TAIWAN, PROVINCE OF CHINA | ||
| Sales revenue, net | 6,951 | 13,964 |
| UNITED STATES | ||
| Sales revenue, net | 5,520 | 6,589 |
| KOREA, REPUBLIC OF | ||
| Sales revenue, net | 1,675 | 1,511 |
| Rest of the World [Member] | ||
| Sales revenue, net | $ 3,628 | $ 4,254 |