Concentrations

6 Months Ended

Jun. 30, 2015

Notes to Financial Statements

8. Concentrations

During the three months ended June 30, 2015, two vendors represented 65% and 11% of total inventory purchases, and 69% and 11% of total inventory purchases for the six months ended June 30, 2015.  During the three months ended June 30, 2014, two vendors represented 74% and 12% of total inventory purchases, and 64% and 14% of total inventory purchases for the six months ended June 30, 2014.  Two vendors represented 40% and 12% of the accounts payable balance as of June 30, 2015 and 36% and 11% as of December 31, 2014.  One customer represented 16% and 22% of the accounts receivable balance as of June 30, 2015 and December 31, 2014, respectively.