Concentrations

3 Months Ended

Mar. 31, 2016

Notes to Financial Statements

8. Concentrations

During the three months ended March 31, 2016, three vendors represented 49%, 16% and 15% of total inventory purchases. During the three months ended March 31, 2015, two vendors represented 74% and 10% of total inventory purchases, respectively.

Two vendors represented 40% and 12% of the accounts payable balance as of March 31, 2016.  Two vendors represented 43% and 13% of the accounts payable balance as of December 31, 2015.