Note 4 - Supplemental Financial Information - Software, Equipment and Leasehold Improvements (Details) - USD ($)
$ in Thousands |
3 Months Ended |
|
Apr. 29, 2017 |
Jan. 28, 2017 |
| Property, plant, and equipment, gross |
$ 89,322
|
$ 85,808
|
| Less: Accumulated depreciation and amortization |
(69,942)
|
(67,285)
|
| Total software, equipment and leasehold improvements, net |
19,380
|
18,523
|
| Software and Software Development Costs [Member] |
|
|
| Property, plant, and equipment, gross |
$ 49,999
|
49,915
|
| Software and Software Development Costs [Member] | Minimum [Member] |
|
|
| Estimated Useful Lives (Year) |
3 years
|
|
| Software and Software Development Costs [Member] | Maximum [Member] |
|
|
| Estimated Useful Lives (Year) |
5 years
|
|
| Mask Sets [Member] |
|
|
| Property, plant, and equipment, gross |
$ 21,255
|
18,209
|
| Estimated Useful Lives (Year) |
3 years
|
|
| Equipment [Member] |
|
|
| Property, plant, and equipment, gross |
$ 8,021
|
7,719
|
| Estimated Useful Lives (Year) |
3 years
|
|
| Office Equipment [Member] |
|
|
| Property, plant, and equipment, gross |
$ 7,918
|
7,857
|
| Office Equipment [Member] | Minimum [Member] |
|
|
| Estimated Useful Lives (Year) |
3 years
|
|
| Office Equipment [Member] | Maximum [Member] |
|
|
| Estimated Useful Lives (Year) |
5 years
|
|
| Leasehold Improvements [Member] |
|
|
| Property, plant, and equipment, gross |
$ 2,129
|
$ 2,108
|
| Leasehold Improvements [Member] | Minimum [Member] |
|
|
| Estimated Useful Lives (Year) |
1 year
|
|
| Leasehold Improvements [Member] | Maximum [Member] |
|
|
| Estimated Useful Lives (Year) |
5 years
|
|