XML 36 R25.htm IDEA: XBRL DOCUMENT v3.10.0.1
Summary of Significant Accounting Policies (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2018
Dec. 30, 2017
Jul. 01, 2017
Dec. 31, 2016
Restricted cash $ 1,100 $ 2,800    
Carrying value of convertible promissory note 14,200 14,100    
Estimated fair value of convertible promissory note 12,000 12,300    
Impairment of long-lived assets $ 0      
ASU 2016-18        
Restricted cash   $ 2,800 $ 3,100 $ 3,100