Deferred Revenue - Changes in Deferred Revenue (Details) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2019 |
Dec. 31, 2018 |
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| Change in Contract with Customer, Liability [Roll Forward] | ||
| Balance, beginning of the year | $ 41,061 | $ 32,046 |
| Deferral of revenue | 46,291 | 37,563 |
| Deferred revenue from 6RS acquisition | 8,901 | 0 |
| Recognition of deferred revenue | (33,593) | (28,548) |
| Balance, end of the year | $ 62,660 | $ 41,061 |
| X | ||||||||||
- Definition Change in Contract with Customer, Liability [Roll Forward] No definition available.
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| X | ||||||||||
- Definition Contract with Customer, Liability, Deferral of Revenue 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://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of increase (decrease) in obligation to transfer good or service to customer for which consideration from customer has been received or is due, from business combination. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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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://www.xbrl.org/2003/role/disclosureRef
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