| Cover | Apr. 16, 2024 |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Apr. 16, 2024 |
| Entity File Number | 001-41039 |
| Entity Registrant Name | Perception Capital Corp. IV |
| Entity Central Index Key | 0001870143 |
| Entity Tax Identification Number | 00-0000000 |
| Entity Incorporation, State or Country Code | E9 |
| Entity Address, Address Line One | 3109 W. 50th Street |
| Entity Address, Address Line Two | #207 |
| Entity Address, City or Town | Minneapolis |
| Entity Address, State or Province | MN |
| Entity Address, Postal Zip Code | 55410 |
| City Area Code | (720) |
| Local Phone Number | 946-1444 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | true |
| Elected Not To Use the Extended Transition Period | false |
| Entity Information, Former Legal or Registered Name | RCF Acquisition Corp. |
| Units, each consisting of one Class A ordinary share, $0.0001 par value, and one-half of one redeemable warrant | |
| Title of 12(b) Security | Units, each consisting of one Class A ordinary share, $0.0001 par value, and one-half of one redeemable warrant |
| Trading Symbol | RCFA.U |
| Security Exchange Name | NYSE |
| Class A ordinary shares, par value $0.0001 par value | |
| Title of 12(b) Security | Class A ordinary shares, par value $0.0001 par value |
| Trading Symbol | RCFA |
| Security Exchange Name | NYSE |
| Redeemable warrants, each warrant exercisable for one Class A ordinary share, each at an exercise price of $11.50 per share | |
| Title of 12(b) Security | Redeemable warrants, each warrant exercisable for one Class A ordinary share, each at an exercise price of $11.50 per share |
| Trading Symbol | RCFA WS |
| Security Exchange Name | NYSE |
