Note 6 - Equity Incentive Plan and Stock-Based Compensation (Details) - Shares Available for Grant
6 Months Ended
Jun. 29, 2014
Restricted Stock Units (RSUs) [Member] | Two Thousand Ten Equity Incentive Award Plan [Member]
 
Note 6 - Equity Incentive Plan and Stock-Based Compensation (Details) - Shares Available for Grant [Line Items]  
Awards other than options granted, net of forfeitures/cancellations (952,239)
Restricted Stock Units (RSUs) [Member]
 
Note 6 - Equity Incentive Plan and Stock-Based Compensation (Details) - Shares Available for Grant [Line Items]  
Awards other than options granted, net of forfeitures/cancellations (1,042,532)
Key Executive Rsu [Member] | Two Thousand Ten Equity Incentive Award Plan [Member]
 
Note 6 - Equity Incentive Plan and Stock-Based Compensation (Details) - Shares Available for Grant [Line Items]  
Awards other than options granted, net of forfeitures/cancellations 357,870
Performance Stock Units [Member] | Two Thousand Ten Equity Incentive Award Plan [Member]
 
Note 6 - Equity Incentive Plan and Stock-Based Compensation (Details) - Shares Available for Grant [Line Items]  
Awards other than options granted, net of forfeitures/cancellations (256,000) [1]
Performance Stock Units [Member]
 
Note 6 - Equity Incentive Plan and Stock-Based Compensation (Details) - Shares Available for Grant [Line Items]  
Awards other than options granted, net of forfeitures/cancellations (274,000) [1]
Two Thousand Ten Equity Incentive Award Plan [Member]
 
Note 6 - Equity Incentive Plan and Stock-Based Compensation (Details) - Shares Available for Grant [Line Items]  
Balance as of December 29, 2013 2,350,404
Additional shares issuable under 2010 plan (annual increase for 2014) 2,069,902
Stock options forfeited/cancelled through June 29, 2014 298,269
Balance as of June 29, 2014 3,868,206
[1] Includes performance awards granted in fiscal 2014 at target. Additional awards that could be earned under the fiscal 2014 grant total 137,000.