XML 41 R31.htm IDEA: XBRL DOCUMENT v3.7.0.1
Note 12 - Stock-based Compensation (Tables)
 3 Months Ended
Apr. 01, 2017
Notes Tables  
Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block]
   
Number of Unvested
Restricted Shares of
Common Stock and
Restricted Stock Units
    
Weighted Average
Grant Date Fair
Value
  
                 
Unvested shares as of January 1, 2017
    
502,773
    $
19.35
 
Granted
    
18,539
    $
35.15
 
Vested
    
(66,855
 )   $
8.97
 
Forfeited
    
-
    $
-
 
Unvested shares as of April 1, 2017
    
454,457
    $
21.52