XML 93 R66.htm IDEA: XBRL DOCUMENT
v3.21.1

INCOME TAXES - Summary of effect of tax holiday (Detail) - CNY (¥) ¥ / shares in Units, ¥ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Income Tax Disclosure [Abstract] |  |  |
Tax saving amount due to HNTE status |  | ¥ 106,516 | ¥ 90,819
Tax saving amount due to Software enterprise | ¥ 7,527 |  |
Tax expense amount due to other jurisdiction | ¥ (17,405) | ¥ (411) |
Income (loss) per share effect-basic and diluted | ¥ (0.05) | ¥ 0.50 | ¥ 0.45

X
- Definition Income tax holiday income tax expense (benefits) per share. + References No definition available. + Details
Name: | jfin_IncomeTaxHolidayIncomeTaxExpenseBenefitsPerShare
Namespace Prefix: | jfin_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Income tax holiday tax expense amount. + References No definition available. + Details
Name: | jfin_IncomeTaxHolidayTaxExpenseAmount
Namespace Prefix: | jfin_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Income tax holiday tax saving amount software enterprises. + References No definition available. + Details
Name: | jfin_IncomeTaxHolidayTaxSavingAmountSoftwareEnterprises
Namespace Prefix: | jfin_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

X
- Definition The amount of income taxes from which a reporting entity is exempt or for which it will receive a reduction in income taxes as a result of the income tax holiday granted by the taxing jurisdiction. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 11.C) -URI http://asc.fasb.org/extlink&oid=116825942&loc=d3e330215-122817 + Details
Name: | us-gaap_IncomeTaxHolidayAggregateDollarAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration