Basis of Presentation and Summary of Significant Accounting Policies - Schedule of Contract Liabilities Rollforward (Details) - USD ($) $ in Thousands |
3 Months Ended | ||
|---|---|---|---|
Mar. 31, 2019 |
Mar. 31, 2019 |
Dec. 31, 2018 |
|
| Contract with Customer, Liability [Roll Forward] | |||
| Beginning balance | $ 8,546 | ||
| Revenue recognized that was included in the contract liability balance at the beginning of the period | (3,497) | ||
| Increase due to cash received, excluding amounts recognized as revenue during the period | 4,224 | ||
| Ending balance | 9,273 | ||
| Deferred revenue, current | $ 9,018 | $ 7,430 | |
| Deferred revenue, non-current | 255 | 1,116 | |
| Deferred revenue | $ 8,546 | $ 9,273 | $ 8,546 |
| X | ||||||||||
- Definition Contract with Customer, Liability, Cash Received Net of Revenue Recognized No definition available.
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| X | ||||||||||
- Definition Contract with Customer, Liability [Roll Forward] No definition available.
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| X | ||||||||||
- 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 obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as current. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as noncurrent. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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