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Commitments and contingencies (Tables) | 12 Months Ended
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Dec. 31, 2015
Commitments and contingencies |
Schedule of future minimum lease payments | Future minimum lease payments as of December 31, 2015 are as follows:
2016 |  | $ | 1,529 |
2017 |  |  | 966 |
2018 |  |  | 1,035 |
2019 |  |  | 176 |
2020 |  |  | — |
Thereafter |  |  | — |
​ | ​ | ​ | ​ | ​
|  | $ | 3,706 |
​ | ​ | ​ | ​ | ​

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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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 + Details
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