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Commitments and contingencies (Tables) | 12 Months Ended
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Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract] |
Summary of Significant Contractual Obligations and Commercial Commitments | The following table summarizes our significant contractual obligations and commercial commitments at December 31, 2018, and the effects such obligations are expected to have on our liquidity and cash flows in future periods (in thousands):
|  | Total |  | Less than 1 year |  | 1-3 years |  | 3-5 years |  | More than 5 years
Maynard office lease |  | $ | 278 |  |  | $ | 63 |  |  | $ | 131 |  |  | $ | 84 |  |  | $ | — |
Panama site lease |  | 60 |  |  | 60 |  |  | — |  |  | — |  |  | — |
Indiana auto lease |  | 11 |  |  | 5 |  |  | 6 |  |  | — |  |  | — |
Indiana well lease |  | 717 |  |  | 15 |  |  | 32 |  |  | 33 |  |  | 637 |
Total |  | $ | 1,066 |  |  | $ | 143 |  |  | $ | 169 |  |  | $ | 117 |  |  | $ | 637 |

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- Definition Tabular disclosure of future minimum payments required in the aggregate and for each of the five succeeding fiscal years for operating leases having initial or remaining noncancelable lease terms in excess of one year and the total minimum rentals to be received in the future under noncancelable subleases as of the balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41502-112717 + Details
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