NOTE 11—SEGMENT INFORMATION

The Company currently operates in a single business segment. Management uses one measurement of profitability and does not segregate its business for internal reporting. For the three and nine months ended September 30, 2018, sales to customers in the United States accounted for approximately 64% and 60% of net revenue, respectively, and international sales accounted for approximately 36% and 40% of net revenue, respectively. For the three and nine months ended September 30, 2017, sales to customers in the United States accounted for approximately 63% and 64% of net revenue, respectively, and international sales accounted for approximately 37% and 36% of net revenue, respectively. No individual country, other than the United States, represented more than 10% of total net revenue during the three and nine months ended September 30, 2018 or 2017.

Net revenue by geographic location based on the location of customers was as follows (in thousands):  

Property, plant, and equipment by geographic location was as follows (in thousands):