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Commitments and Contingencies (Tables) | 12 Months Ended
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Dec. 31, 2017
Commitments and Contingencies |
Schedule of future minimum lease payments under non-cancelable operating leases and purchase commitments | Future minimum lease payments under non-cancelable operating leases and purchase commitments are (in thousands):
|  | Operating |  |
Year ended December 31, |  | leases |  |
2018 |  | $ | 213 |  |
2019 |  |  | 219 |  |
2020 |  |  | 187 |  |
Total minimum payments |  | $ | 619 |  |

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- Definition Tabular disclosure of the aggregate amount of payments due on known contractual obligations for the five years following the date of the latest balance sheet and the combined aggregate amount of maturities of known contractual obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 303 -Paragraph a -Subparagraph 5 + Details
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