XML 159 R108.htm IDEA: XBRL DOCUMENT
v3.19.1

PRC CONTRIBUTION AND PROFIT APPROPRIATION (Narrative) (Details) - CNY (¥) ¥ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Contribution and Profit Appropriation [Line Items] |  |  |
Total contribution for employee benefits | ¥ 37,594 | ¥ 35,241 | ¥ 29,029
China [Member] | Minimum [Member] |  |  |
Contribution and Profit Appropriation [Line Items] |  |  |
Percentage appropriation to statutory reserve required for education development reserve | 25.00% |  |
China [Member] | Minimum [Member] | Variable Interest Entity, Primary Beneficiary [Member] |  |  |
Contribution and Profit Appropriation [Line Items] |  |  |
Percentage appropriation to statutory surplus reserve required | 5.00% |  |
Percentage appropriation to statutory public welfare fund required | 10.00% |  |
China [Member] | Maximum [Member] | Variable Interest Entity, Primary Beneficiary [Member] |  |  |
Contribution and Profit Appropriation [Line Items] |  |  |
Reserve level threshold for mandatory transfer requirement (as a percent) | 50.00% |  |
Percentage appropriation to statutory surplus reserve required | 10.00% |  |
Subsidiaries [Member] | China [Member] | Minimum [Member] |  |  |
Contribution and Profit Appropriation [Line Items] |  |  |
Percentage appropriation to general reserve fund required | 10.00% |  |
Subsidiaries [Member] | China [Member] | Maximum [Member] |  |  |
Contribution and Profit Appropriation [Line Items] |  |  |
Reserve level threshold for mandatory transfer requirement (as a percent) | 50.00% |  |

X
- Definition Represents the percentage of after tax profit required to be appropriated to the education development reserve under PRC GAAP. + References No definition available. + Details
Name: | amboy_AppropriationOfAfterTaxProfitToEducationDevelopmentReserveRequiredPercentage
Namespace Prefix: | amboy_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the percentage of after tax profit required to be appropriated to the general reserve under PRC GAAP. + References No definition available. + Details
Name: | amboy_AppropriationOfAfterTaxProfitToGeneralReserveFundRequiredPercentage
Namespace Prefix: | amboy_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the percentage of after tax profit required to be appropriated to the statutory public welfare fund under PRC GAAP. + References No definition available. + Details
Name: | amboy_AppropriationOfAfterTaxProfitToStatutoryPublicWelfareFundRequiredPercentage
Namespace Prefix: | amboy_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the percentage of after tax profit required to be appropriated to the statutory surplus reserve under PRC GAAP. + References No definition available. + Details
Name: | amboy_AppropriationOfAfterTaxProfitToStatutorySurplusReserveRequiredPercentage
Namespace Prefix: | amboy_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Represents the level of the fund balance as a percentage of registered capital for entities incorporated in the People's Republic of China which must be attained before mandatory transfers to the reserve are no longer required. + References No definition available. + Details
Name: | amboy_ReserveLevelThresholdForMandatoryTransferPercentage
Namespace Prefix: | amboy_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of cost for defined contribution plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 + Details
Name: | us-gaap_DefinedContributionPlanCostRecognized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | amboy_CountryAxis=country_CN
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_VariableInterestEntitiesByClassificationOfEntityAxis=us-gaap_VariableInterestEntityPrimaryBeneficiaryMember
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: | srt_ConsolidatedEntitiesAxis=srt_SubsidiariesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |