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O. MAJOR CUSTOMERS
12 Months Ended
Dec. 31, 2015
O. Major Customers  
MAJOR CUSTOMERS

The Company currently derives its revenues from customers in the United States and throughout the rest of the world. Generally, the Company does not require deposits or other collateral to support customer receivables. The Company performs an initial and periodic credit evaluation of its customers and maintains an allowance for uncollectible accounts for potential uncollectible accounts. The historical amount of losses on uncollectible accounts has been within the Company’s estimates. The Company generates much of its revenue from a limited number of customers. In 2015, 2014 and 2013, its top five customers represented 81.8%, 72.0% and 59.1% of its revenue, respectively. In 2015, Amazon, Microsoft and Cisco represented 52.5%, 11.6% and 10.4% of its revenue, respectively. The five largest receivable balances for customers represented an aggregate of 80%, and 70% of total accounts receivable at December 31, 2015 and 2014, respectively. As of December 31, 2015, Amazon and Wesco represented 51.4% and 14.4% of total accounts receivable, respectively.