Note 6 - Commitments and Contingencies (Details Textual) - USD ($) $ in Millions |
1 Months Ended | 3 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2016 |
Oct. 31, 2015 |
Apr. 29, 2017 |
Apr. 30, 2016 |
|
| Purchase Commitment, Remaining Minimum Amount Committed | $ 20.2 | |||
| Percentage of Royalties | 4.50% | |||
| Accrued Royalties | $ 1.2 | |||
| Research and Development [Member] | ||||
| Proceeds from Grantors | 5.2 | |||
| Cost of Sales [Member] | ||||
| Direct Operating Cost, Royalty Expense | 0.6 | $ 1.3 | ||
| Licensed Technology from Supplier One [Member] | ||||
| Remaining Long Term Purchase Commitment Amount | 3.0 | |||
| Long-term Purchase Commitment, Amount | $ 6.1 | |||
| Licensed Technology from Supplier Two [Member] | ||||
| Long-term Purchase Commitment, Amount | 2.5 | |||
| Design Tool Licenses from Supplier One [Member] | ||||
| Remaining Long Term Purchase Commitment Amount | 5.9 | |||
| Long-term Purchase Commitment, Amount | $ 7.8 | |||
| Design Tool Licenses from Supplier Two [Member] | ||||
| Long-term Purchase Commitment, Amount | $ 0.6 | |||