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ORGANIZATION AND BASIS OF PRESENTATION - VIE arrangements (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Exclusive Consultation and Service Agreement |  |  |
VIE arrangements |  |  |
Fees for consultation and service | $ 1,461 | $ 6,075 | $ 2,139
Equity Disposal Agreement |  |  |
VIE arrangements |  |  |
Term of agreement (in years) | 10 years |  |
Beijing RYB Technology Development Co., Ltd ("RYB Technology") | Exclusive Consultation and Service Agreement |  |  |
VIE arrangements |  |  |
Term of agreement (in years) | 10 years |  |
Beijing RYB Technology Development Co., Ltd ("RYB Technology") | Business Operation Agreement |  |  |
VIE arrangements |  |  |
Term of agreement (in years) | 10 years |  |

X
- Definition The term of collaborative arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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Namespace Prefix: | ryb_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of fees charged for consultation and services under a collaborative arrangement. + References No definition available. + Details
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Balance Type: | debit
Period Type: | duration

X
- 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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- Details
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- Details
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X
- Details
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- Details
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