| Submission | Nov. 15, 2024 |
| Submission [Line Items] | |
| Central Index Key | 0001704292 |
| Registrant Name | Zai Lab Limited |
| Registration File Number | 333-278843 |
| Form Type | S-3 |
| Submission Type | 424B5 |
| Fee Exhibit Type | EX-FILING FEES |
| Offerings - Offering: 1 | Nov. 15, 2024 USD ($) shares |
| Offering: | |
| Fee Previously Paid | false |
| Rule 457(r) | true |
| Security Type | Equity |
| Security Class Title | Ordinary Shares, par value $0.000006 per share |
| Amount Registered | shares | 9,019,607 |
| Proposed Maximum Offering Price per Unit | 25.5 |
| Maximum Aggregate Offering Price | $ 229,999,978 |
| Fee Rate | 0.01531% |
| Amount of Registration Fee | $ 35,212 |
| Offering Note | (1) The Ordinary Shares may be represented by American depositary shares, or ADSs, each of which represents one Ordinary Share. ADSs issuable upon deposit of Ordinary Shares registered hereby, have been registered under a separate registration statement on Form F-6 No. 333-273257). (2) The registration fee is calculated in accordance with Rule 457(r) of the Securities Act of 1933 and represents deferred payment of the registration fees in connection with the Registrant’s registration statement on Form S-3ASR No. 333-278843) (3) Includes up to 1,176,470 ADSs that the underwriters may purchase pursuant to their option to purchase additional ADSs. |
| Fees Summary | Nov. 15, 2024 USD ($) |
| Fees Summary [Line Items] | |
| Total Offering | $ 229,999,978 |
| Previously Paid Amount | 0 |
| Total Fee Amount | 35,212 |
| Total Offset Amount | 0 |
| Net Fee | $ 35,212 |
