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Business Segments, Concentration of Credit Risk and Significant Customers | 12 Months Ended
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Dec. 31, 2018
Segment Reporting [Abstract] |
Business Segments, Concentration of Credit Risk and Significant Customers | Note 8: Business Segments, Concentration of Credit Risk and Significant Customers The Company operates in one business segment and uses one measurement of profitability for its business. Revenue attributed to the United States and to all foreign countries is based on the geographical location of the customer. Financial instruments that potentially subject the Company to significant concentrations of credit risk consist principally of cash, cash equivalents, short-term and long-term investments and accounts receivable. Cash, cash equivalents and short-term and long-term investments are deposited with high credit-quality institutions. The Company recognized revenue from licensing of its technologies and shipment of ICs to customers in North America, Asia and Rest of world as follows (in thousands):
|  | Year Ended |
|  | December 31, |
|  | 2018 |  |  | 2017 |  |  | 2016 |
North America |  | $ | 12,998 |  |  | $ | 6,531 |  |  | $ | 3,816 |
Japan |  |  | 2,956 |  |  |  | 1,520 |  |  |  | 1,303 |
Taiwan |  |  | 399 |  |  |  | 613 |  |  |  | 804 |
Rest of world |  |  | 247 |  |  |  | 178 |  |  |  | 101 |
Total net revenue |  | $ | 16,600 |  |  | $ | 8,842 |  |  | $ | 6,024 |
Customers who accounted for at least 10% of total net revenues were:
|  | Year Ended |
|  | December 31, |
|  | 2018 |  |  | 2017 |  |  | 2016 |
Customer A |  |  | 32 | % |  |  | 46 | % |  | * |
Customer B |  |  | 18 | % |  |  | 17 | % |  |  | 21 | %
Customer C |  |  | 18 | % |  | * |  |  | * |
Customer D |  |  | 15 | % |  |  | 11 | % |  |  | 47 | %
Customer E |  | * |  |  | * |  |  |  | 13 | %
* | Represents percentage less than 10%.
Three customers accounted for 63% of net accounts receivable as of December 31, 2018. One customer accounted for 63% of net accounts receivable as of December 31, 2017. All net long-lived assets (property and equipment) were held in the United States.

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- Definition The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -URI http://asc.fasb.org/topic&trid=2134510 + Details
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