| Document And Entity Information | Aug. 14, 2024 |
| Cover [Abstract] | |
| Document Type | 8-K/A |
| Amendment Flag | true |
| Amendment Description | The Company is filing this Amendment No. 1 on Form 8K/A (the “Amendment”) to the Current Report on Form 8-K filed with the Securities and Exchange Commission (“SEC”) on August 14, 2024 (“Original Form 8-K”) due to a clerical error with respect to the amount shown in the cash balance reflected in the condensed interim balance sheet as of December 31, 2023 included in the press release issued on August 14, 2024. Except as stated herein, this Current Report on Form 8-K/A does not reflect events occurring after the filing of the Original Form 8-K on August 14, 2024 and no attempt has been made to this Current Report on Form 8-K/A to modify or update other disclosures as presented in the Original Form 8-K. Accordingly, this Form 8-K/A should be read in conjunction with the Original Form 8-K and our filings with the SEC subsequent to the filing of the Original Form 8-K. |
| Document Period End Date | Aug. 14, 2024 |
| Entity Registrant Name | HCW Biologics Inc. |
| Entity Central Index Key | 0001828673 |
| Entity Emerging Growth Company | true |
| Entity File Number | 001-40591 |
| Entity Incorporation, State or Country Code | DE |
| Entity Tax Identification Number | 82-5024477 |
| Entity Address, Address Line One | 2929 N. Commerce Parkway |
| Entity Address, City or Town | Miramar |
| Entity Address, State or Province | FL |
| Entity Address, Postal Zip Code | 33025 |
| City Area Code | 954 |
| Local Phone Number | 842-2024 |
| Entity Information, Former Legal or Registered Name | Not Applicable |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Ex Transition Period | true |
| Title of 12(b) Security | Common Stock, par value $0.0001 per share |
| Trading Symbol | HCWB |
| Security Exchange Name | NASDAQ |
