Concentration of Credit Risk

12 Months Ended

Dec. 31, 2015

18.

CONCENTRATION OF CREDIT RISK

Our accounts receivable subject us to the potential for credit risk with our customers. At December 31, 2015, three customers accounted for $38.6 million or 10.4% of gross accounts receivable, compared to $19.4 million, or 5.4% of gross accounts receivables at December 31, 2014. We perform ongoing credit evaluations of our customers’ financial condition. We maintain an allowance for doubtful accounts for potential credit losses based upon historical trends, specific collection problems, historical write-offs, account aging and other analysis of all accounts receivable. At February 12, 2016, $26.6 million, or 68.9%, of the December 31, 2015 accounts receivable from the three customers noted above had been received.