Annual report pursuant to Section 13 and 15(d)

Public Stock Offering (Details Textual)

v3.19.3.a.u2
Public Stock Offering (Details Textual) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Feb. 06, 2018
Dec. 28, 2019
Dec. 29, 2018
Dec. 30, 2017
Subsidiary Sale Of Stock [Line Items]        
Proceeds from stock issued   $ 1,650 $ 241,338 $ 1,156
Common stock [Member]        
Subsidiary Sale Of Stock [Line Items]        
Sale of stock     4,400,000  
Common stock [Member] | Public Offering [Member]        
Subsidiary Sale Of Stock [Line Items]        
Sale of stock 4,400,000      
Shares price per share $ 57.50      
Proceeds from stock issued $ 239,793