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Concentration and Major Customers and Suppliers | 3 Months Ended
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Mar. 31, 2019
Concentration and Major Customers and Suppliers [Abstract] |
Concentration and Major Customers and Suppliers | (18) Concentration and Major Customers and Suppliers For the three months ended March 31, 2019, the Company had no single customer contributed over 10% of total sales. For the three months ended March 31, 2018, the Company had no single customer contributed over 10% of total sales. For the three months ended March 31, 2019, the Company had three major suppliers accounted for 80%, 9% and 4% of total purchases. For the three months ended March 31, 2018, the Company had three major suppliers accounted for 41%, 20% and 10% of total purchases.

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