Quarterly report pursuant to Section 13 or 15(d)

Segment Reporting (Narrative) (Details)

v3.8.0.1
Segment Reporting (Narrative) (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2018
USD ($)
state
store
segment
item
Mar. 31, 2017
USD ($)
Dec. 31, 2017
USD ($)
store
Dec. 31, 2016
USD ($)
Segment Reporting Information [Line Items]        
Minimum number of operating segments with similar characteristics to be considered as a reportable segment | segment 1      
Revenues $ 218,042 $ 185,434 [1]    
Property and equipment, net $ 114,865   $ 111,929 [1] $ 95,408
IT'SUGAR, LLC [Member]        
Segment Reporting Information [Line Items]        
Number of retail locations | store 96      
Number of states of retail locations | state 25      
MOD Super-Fast Pizza [Member]        
Segment Reporting Information [Line Items]        
Number of retail locations | store     2  
Number of stores opened | store 1      
Reportable Segments [Member] | Renin [Member]        
Segment Reporting Information [Line Items]        
Number of major customers | item 2      
Revenues $ 14,986 17,217    
Reportable Segments [Member] | Renin [Member] | Customer Concentration Risk [Member]        
Segment Reporting Information [Line Items]        
Revenues 8,500 8,200    
Reportable Segments [Member] | Outside United States [Member] | Renin [Member]        
Segment Reporting Information [Line Items]        
Revenues 4,600 6,300    
Property and equipment, net $ 2,200 $ 2,000    
[1] See Note 1 for a summary of adjustments.