Sales to our five largest customers accounted for approximately 100% and 33% of our net sales during the three months ended March 31, 2018 and 2017, respectively. One single customer represented over 87% of total sales for the three months ended March 31, 2018, and there was no single customer representing over 10% of total sales for the three months ended March 31, 2017.

Two suppliers accounted for 1% and 74% of our purchases for the three months ended March 31, 2018 and 2017, respectively. There was no supplier that accounted for over 10% of our purchases for the three months ended March 31, 2018, and our top supplier accounted for 74% of our purchases for the three months ended March 31, 2017.