Note 4 - Supplemental Financial Information (Details Textual) - USD ($) $ in Thousands |
3 Months Ended | ||
|---|---|---|---|
Apr. 29, 2017 |
Apr. 30, 2016 |
Jan. 28, 2017 |
|
| Depreciation, Depletion and Amortization, Nonproduction | $ 2,700 | $ 3,400 | |
| Property, Plant and Equipment, Net | 19,380 | $ 18,523 | |
| Collaborative Arrangement, Product [Member] | Telechips Inc [Member] | Mask Sets [Member] | |||
| Property, Plant and Equipment, Net | $ 2,600 | ||