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Inventories (Details) - USD ($)
Mar. 31, 2020
Dec. 31, 2019
Inventories $ 9,397,523 $ 9,509,454
DGSE    
Inventories 8,588,668 8,615,019
DGSE | Resale    
Inventories 8,440,885 8,213,551
DGSE | Recycle    
Inventories 147,783 401,468
ECHG    
Inventories 808,855 894,435
ECHG | Resale    
Inventories 202,512 351,958
ECHG | Recycle    
Inventories $ 606,343 $ 542,477