XML 44 R38.htm IDEA: XBRL DOCUMENT
v3.20.1

ORGANIZATION AND PRINCIPAL ACTIVITIES - Summary of principal subsidiaries and VIEs (Detail) | 12 Months Ended
--- | ---
Dec. 31, 2019
Subsidiaries [Member] | Jiayin Holdings Limited |
Date of incorporation/establishment or acquisition | Jan. 31, 2018
Place of incorporation/establishment | BVI
Percentage of legal ownership | 100.00%
Principal activities | Investment Holding
Subsidiaries [Member] | Geerong(HK) Limited (formerly known as "Jiayin (HK) Limited") |
Date of incorporation/establishment or acquisition | Jan. 31, 2018
Place of incorporation/establishment | Hong Kong
Percentage of legal ownership | 100.00%
Principal activities | Investment Holding
Subsidiaries [Member] | Jiayin Southeast Asia Holdings Limited |
Date of incorporation/establishment or acquisition | Feb. 28, 2018
Place of incorporation/establishment | BVI
Percentage of legal ownership | 100.00%
Principal activities | Investment Holding
Subsidiaries [Member] | Shanghai Kunjia Technology Co., Ltd. |
Date of incorporation/establishment or acquisition | Jun. 30, 2018
Place of incorporation/establishment | Shanghai
Percentage of legal ownership | 100.00%
Principal activities | Investment Holding
Subsidiaries [Member] | Geerong Yunke Information Technology Co., Ltd |
Date of incorporation/establishment or acquisition | Jul. 30, 2019
Place of incorporation/establishment | Shanghai
Percentage of legal ownership | 100.00%
Principal activities | Technology development and consumer finance services
Subsidiaries [Member] | Geerong Yun (Shanghai) Enterprise Development Co., Ltd. |
Date of incorporation/establishment or acquisition | Sep. 30, 2019
Place of incorporation/establishment | Shanghai
Percentage of legal ownership | 100.00%
Principal activities | Technology development and consumer finance services
Variable Interest Entity, Primary Beneficiary [Member] | Shanghai Jiayin Finance Technology Co., Ltd. |
Date of incorporation/establishment or acquisition | Jun. 30, 2015
Place of incorporation/establishment | Shanghai
Percentage of legal ownership | 100.00%
Principal activities | Technology service
Variable Interest Entity, Primary Beneficiary [Member] | Shanghai Niwodai Internet Finance Information Services Co., Ltd. |
Date of incorporation/establishment or acquisition | Sep. 30, 2015
Place of incorporation/establishment | Shanghai
Percentage of legal ownership | 100.00%
Principal activities | Technology development and consumer finance services

X
- Definition Date when an entity was incorporated + References No definition available. + Details
Name: | dei_EntityIncorporationDateOfIncorporation
Namespace Prefix: | dei_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Entity Incorporation, State Country Name + References No definition available. + Details
Name: | jfin_EntityIncorporationStateorCountryName
Namespace Prefix: | jfin_
Data Type: | xbrli:normalizedStringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of subsidiary's or equity method investee's stock owned by parent immediately after all stock transactions. + References No definition available. + Details
Name: | us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Description of the major products or services that a subsidiary or equity investee sells or provides and its principal markets, including locations of those markets. + References No definition available. + Details
Name: | us-gaap_SubsidiaryOrEquityMethodInvesteeNatureOfOperations
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of the Variable Interest Entity's (VIE) voting interest owned by (or beneficial interest in) the reporting entity (directly or indirectly). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 5A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=118582676&loc=SL6759159-111685 + Details
Name: | us-gaap_VariableInterestEntityOwnershipPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The overall reason that the Variable Interest Entity (VIE) was formed. For example, the VIE was formed to hold financial assets, including loans or receivables, real estate or other property or to engage in research and development or other activities on behalf of another company. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph b -URI http://asc.fasb.org/extlink&oid=118582676&loc=d3e5747-111685 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118582676&loc=d3e5728-111685 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118582676&loc=d3e5747-111685 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 16 -Subparagraph (c,d) -URI http://asc.fasb.org/extlink&oid=118582676&loc=SL6228967-111685 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 5A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=118582676&loc=SL6759159-111685 + Details
Name: | us-gaap_VariableInterestEntityVIEPurposeOfVIE
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=srt_SubsidiariesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=jfin_JiayinHoldingsLimitedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=jfin_GeerongHKLimitedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=jfin_JiayinSoutheastAsiaHoldingsLimitedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=jfin_ShanghaiKunjiaTechnologyCoLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=jfin_GeerongyunkeInformationTechnologyCoLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=jfin_GeerongYunShanghaiEnterpriseDevelopmentCoLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis=jfin_ShanghaiJiayinFinanceTechnologyCoLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis=jfin_ShanghaiNiwodaiInternetFinanceInformationServicesCoLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |