Revenue - Revenue from contracts with customers (Details) $ in Thousands |
3 Months Ended | ||
|---|---|---|---|
|
Mar. 31, 2019
USD ($)
contract
|
Mar. 31, 2018
USD ($)
|
Dec. 31, 2018
USD ($)
|
|
| Revenue | |||
| Revenue | $ 0 | $ 8,196 | |
| Deferred revenue | 0 | $ 0 | |
| Movement in deferred revenue | $ 0 | ||
| Number of contracts with customers | contract | 1 | ||
| X | ||||||||||
- Definition Represents the total number of contracts with customers. No definition available.
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- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of increase (decrease) in obligation to transfer good or service to customer for which consideration has been received or is receivable. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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