XML 171 R120.htm IDEA: XBRL DOCUMENT
v3.19.1

FAIR VALUE MEASUREMENTS (Schedule of Quantitative Information about Level 3 Fair Value Measurements of Property and Equipment, Other Non-current Assets and Intangible Assets) (Details) - CNY (¥) ¥ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Measurement Input, Long-term Revenue Growth Rate [Member] |  |
Unobservable inputs |  |
Terminal growth rate (as a percent) | 3.00% |
Nonrecurring [Member] | Relief-from-royalty method [Member] | Measurement Input, Long-term Revenue Growth Rate [Member] |  |
Unobservable inputs |  |
Terminal growth rate (as a percent) | 3.00% | 3.00%
Nonrecurring [Member] | Relief-from-royalty method [Member] | Minimum [Member] |  |
Unobservable inputs |  |
Royalty rate (as a percent) | 1.00% | 1.00%
Nonrecurring [Member] | Relief-from-royalty method [Member] | Minimum [Member] | Measurement Input, Discount Rate [Member] |  |
Unobservable inputs |  |
Discount rate (as a percent) | 14.80% | 14.80%
Nonrecurring [Member] | Relief-from-royalty method [Member] | Maximum [Member] |  |
Unobservable inputs |  |
Royalty rate (as a percent) | 6.00% | 6.00%
Nonrecurring [Member] | Relief-from-royalty method [Member] | Maximum [Member] | Measurement Input, Discount Rate [Member] |  |
Unobservable inputs |  |
Discount rate (as a percent) | 17.00% | 17.00%
Nonrecurring [Member] | Level 3 [Member] | Relief-from-royalty method [Member] |  |
FAIR VALUE MEASUREMENTS [Line Items] |  |
Intangible assets | ¥ 141,758 | ¥ 91,249

X
- Definition Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt. + References No definition available. + Details
Name: | amboy_FairValueInputsDiscountRates
Namespace Prefix: | amboy_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of assumed long-term growth in revenues, used as an input to measure fair value. + References No definition available. + Details
Name: | amboy_FairValueInputsLongTermRevenueGrowthRates
Namespace Prefix: | amboy_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | amboy_FairValueInputsRoyaltyRate
Namespace Prefix: | amboy_
Data Type: | num:percentItemType
Balance Type: | na
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
Name: | us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_FairValueInputsQuantitativeInformationAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fair value portion of assets, excluding financial assets, that lack physical substance, having a limited useful life. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19190-110258 + Details
Name: | us-gaap_FiniteLivedIntangibleAssetsFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputLongTermRevenueGrowthRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsNonrecurringMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ValuationTechniqueAxis=amboy_ReliefFromRoyaltyMethodValuationTechniqueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputDiscountRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |