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Debt (Tables) | 6 Months Ended
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Jun. 30, 2018
Debt |
Schedule of components of convertible notes | The components of the convertible notes are as follows (in thousands):
|  |  |  |  |  | Carrying Amount, |
|  | Interest Rates |  |  |  | June 30, |  | December 31, |
Debt |  | June 30, 2018 |  | Maturities |  | 2018 |  | 2017 |
0.375% Convertible Senior Notes due 2018 |  | 0.375 | % | 2018 |  | $ | 7,554 |  |  | 7,393 |
1.25% Convertible Senior Notes due 2020 |  | 1.25 | % | 2020 |  |  | 17,016 |  |  | 16,608 |
|  |  |  |  |  |  | 24,570 |  |  | 24,001 |
Less current portion |  |  |  |  |  |  | 7,554 |  |  | 7,393 |
|  |  |  |  |  | $ | 17,016 |  | $ | 16,608 |
Schedule of carrying amount and fair value of convertible notes | The carrying amount and fair value of our convertible notes are as follows (in thousands):
|  | June 30, 2018 |  | December 31, 2017 |
|  | Carrying |  |  |  |  | Carrying |  |  |  |
|  | Amount |  | Fair Value |  | Amount |  | Fair Value |
0.375% Convertible Senior Notes due 2018 |  | $ | 7,554 |  | $ | 10,137 |  | $ | 7,393 |  | $ | 14,129 |
1.25% Convertible Senior Notes due 2020 |  |  | 17,016 |  |  | 26,138 |  |  | 16,608 |  |  | 35,431 |
|  | $ | 24,570 |  | $ | 36,275 |  | $ | 24,001 |  | $ | 49,560 |

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- Definition Tabular disclosure of information pertaining to carrying amount and estimated fair value of short-term and long-term debt instruments or arrangements, including but not limited to, identification of terms, features, and collateral requirements. + References No definition available. + Details
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- Definition Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21475-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(e),(f)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21538-112644 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21506-112644 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28541-108399 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21521-112644 + Details
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