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Summary of significant accounting policies (Details) - 12 months ended Dec. 31, 2016 | Total | item | segment
--- | --- | --- | ---
Segment and geographic information |  |  |
Number of operating segments |  | 1 | 1
Computer equipment and software |  |  |
Fixed assets |  |  |
Estimated useful life | 3 years |  |
Furniture, fixtures, and lab equipment | Minimum |  |  |
Fixed assets |  |  |
Estimated useful life | 3 years |  |
Furniture, fixtures, and lab equipment | Maximum |  |  |
Fixed assets |  |  |
Estimated useful life | 7 years |  |

X
- Definition Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
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- Details
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