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Business Segment Information (Details 1) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Summary total assets for the business segments    
Total assets $ 142,421 $ 156,244
GRE [Member]    
Summary total assets for the business segments    
Total assets 107,780 105,937
GRE International [Member]    
Summary total assets for the business segments    
Total assets 10,745 11,468
GES [Member]    
Summary total assets for the business segments    
Total assets 7,124 19,383
GOGAS [Member]    
Summary total assets for the business segments    
Total assets 12,957 10,873
Corporate [Member]    
Summary total assets for the business segments    
Total assets $ 3,815 $ 8,583