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Operating Segments, Geographic Information and Significant Customers (Tables) | 12 Months Ended
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Dec. 31, 2017
Segment Reporting [Abstract] |
Schedule of Segment Reporting Information, by Segment | The following table presents summary results of our operating segments for the year ended December 31, 2015, 2016 and 2017 (in thousands):
| Year Ended December 31,
| 2015 |  | 2016 |  | 2017
Revenue |  |  |  |  |
Medicare | $ | 98,038 |  |  | $ | 122,156 |  |  | $ | 142,448 |
Individual, Family and Small Business | 105,309 |  |  | 71,168 |  |  | 48,258 |
Total revenue | $ | 203,347 |  |  | $ | 193,324 |  |  | $ | 190,706 |
Segment profit |  |  |  |  |
Medicare segment profit | $ | 13,598 |  |  | $ | 10,394 |  |  | $ | 22,137 |
Individual, Family and Small Business segment profit | 38,654 |  |  | 33,050 |  |  | 9,573 |
Total segment profit | 52,252 |  |  | 43,444 |  |  | 31,710 |
Corporate | (25,135 | ) |  | (29,073 | ) |  | (26,970 | )
Stock-based compensation expense | (6,889 | ) |  | (7,266 | ) |  | (9,694 | )
Depreciation and amortization | (4,148 | ) |  | (3,539 | ) |  | (2,837 | )
Restructuring (charge) benefit | (4,541 | ) |  | 297 |  |  | — |
Acquisition costs | — |  |  | — |  |  | (621 | )
Amortization of intangible assets | (1,153 | ) |  | (1,040 | ) |  | (1,040 | )
Other income, net | 1,285 |  |  | 1,149 |  |  | 1,182 |
Income (loss) before provision (benefit) for income taxes | $ | 11,671 |  |  | $ | 3,972 |  |  | $ | (8,270 | )
Schedule Of Long Lived Assets By Geographical Areas | Long-lived assets by geographical area as of December 31, 2016 and December 31, 2017 were as follows (in thousands):
| December 31, 2016 |  | December 31, 2017
United States | $ | 32,162 |  |  | $ | 32,876 |
China | 391 |  |  | 550 |
Total | $ | 32,553 |  |  | $ | 33,426 |
Schedule Of Revenue By Major Customers | arriers representing 10% or more of our total revenue for the years ended December 31, 2015, 2016 and 2017 are presented in the table below:
| Year Ended December 31,
| 2015 |  | 2016 |  | 2017
Humana | 23 | % |  | 22 | % |  | 20 | %
UnitedHealthcare 1 | 12 | % |  | 19 | % |  | 23 | %
Aetna 2 | 11 | % |  | 11 | % |  | 10 | %
(1) | UnitedHealthcare also includes other carriers owned by UnitedHealthcare.
(2) | Aetna includes other carriers owned by Aetna.

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- Definition Tabular disclosure of the extent of the entity's reliance on its major customers, if revenues from transactions with a single external customer amount to 10 percent or more of entity revenues, including the disclosure of that fact, the total amount of revenues from each such customer, and the identity of the reportable segment or segments reporting the revenues. The entity need not disclose the identity of a major customer or the amount of revenues that each segment reports from that customer. For these purposes, a group of companies known to the entity to be under common control is considered a single customer, and the federal government, a state government, a local government such as a county or municipality, or a foreign government is each considered a single customer. + References No definition available. + Details
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- Definition Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8906-108599 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8813-108599 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8721-108599 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8736-108599 + Details
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