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Significant Equity Transactions and Acquisitions - Additional Information (Detail) ¥ in Millions |  | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Nov. 10, 2017 CNY (¥) Founders shares | Oct. 31, 2017 CNY (¥) | Aug. 31, 2017 CNY (¥) | Dec. 31, 2017 | Nov. 10, 2017 $ / shares | Jun. 30, 2012 shares
Significant Equity Transactions And Acquisitions [Line Items] |  |  |  |  |  |
Common stock shares redesignated |  |  |  |  |  | 4,000,000
HB Micro Lending Company [Member] |  |  |  |  |  |
Significant Equity Transactions And Acquisitions [Line Items] |  |  |  |  |  |
Percentage of voting rights |  |  |  | 60.00% |  |
Acquisition date |  |  |  | Oct. 31, 2017 |  |
American Depositary Shares [Member] |  |  |  |  |  |
Significant Equity Transactions And Acquisitions [Line Items] |  |  |  |  |  |
Net proceeds from initial public offering and private placement | ¥ | ¥ 253.0 |  |  |  |  |
Share Purchase Agreement [Member] | HB Micro Lending Company [Member] |  |  |  |  |  |
Significant Equity Transactions And Acquisitions [Line Items] |  |  |  |  |  |
Percentage of common shares acquired |  |  | 32.00% |  |  |
Cash consideration | ¥ |  |  | ¥ 48.2 |  |  |
Equity Pledge Agreement [Member] | HB Micro Lending Company [Member] |  |  |  |  |  |
Significant Equity Transactions And Acquisitions [Line Items] |  |  |  |  |  |
Percentage of common shares acquired |  | 28.00% |  |  |  |
Cash consideration | ¥ |  | ¥ 42.0 |  |  |  |
Gf Sino Vest Fund Spc Star Six SP [Member] |  |  |  |  |  |
Significant Equity Transactions And Acquisitions [Line Items] |  |  |  |  |  |
Common stock shares redesignated |  |  |  |  |  | 4,000,000
Number of founders | Founders | 4 |  |  |  |  |
IPO [Member] | American Depositary Shares [Member] |  |  |  |  |  |
Significant Equity Transactions And Acquisitions [Line Items] |  |  |  |  |  |
Number of shares offered | 17,000,000 |  |  |  |  |
Number of ordinary shares represented by each ADS |  |  |  |  | 5 |
Share price | $ / shares |  |  |  |  | $ 13.00 |
Private Placement [Member] | American Depositary Shares [Member] |  |  |  |  |  |
Significant Equity Transactions And Acquisitions [Line Items] |  |  |  |  |  |
Number of shares offered | 3,846,154 |  |  |  |  |

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- Definition The number of underlying shares represented by one American Depository Receipt (ADR) or Global Depository Receipt (GDR). A value of '3' means that one ADR represents 3 underlying shares. If one underlying share represents 2 ADR's then the value would be represented as '0.5'. + References No definition available. + Details
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