XML 38 R27.htm IDEA: XBRL DOCUMENT v3.7.0.1
Note 4 - Stock-based Compensation (Details Textual) - USD ($)
$ in Millions
1 Months Ended 3 Months Ended
Mar. 31, 2017
Apr. 01, 2017
Apr. 02, 2016
Minimum [Member]      
Performance-based Shares, Payout Opportunity, Percentage 25.00%    
Maximum [Member]      
Performance-based Shares, Payout Opportunity, Percentage 200.00%    
Options and Restricted Stock [Member]      
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized   $ 5.9  
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition   1 year 292 days  
Time-based and Performance-based Shares [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value   $ 1.5 $ 1.2
Performance Shares [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period 3 years    
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Shares Earned   13,704  
Selling, General and Administrative Expenses [Member]      
Allocated Share-based Compensation Expense   $ 1.0 $ 0.7