| Document and Entity Information | Jan. 07, 2021 |
| Document Information [Line Items] | |
| Document Type | 8-K/A |
| Document Period End Date | Jan. 7, 2021 |
| Entity Registrant Name | Crucible Acquisition Corporation |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-39837 |
| Entity Tax Identification Number | 85-3052152 |
| Entity Address, Address Line One | 700 Front Street |
| Entity Address, Address Line Two | Suite 104 |
| Entity Address, City or Town | Louisville |
| Entity Address, State or Province | CO |
| Entity Address, Postal Zip Code | 80027 |
| City Area Code | 401 |
| Local Phone Number | 216-7635 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
| Amendment Flag | false |
| Entity Central Index Key | 0001825497 |
| Units, each consisting of one share of Class A common stock, $0.0001 par value, and one-third of a redeemable warrant to acquire one share of Class A common stock [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Units, each consisting of one share of Class A common stock and one-third of one redeemable warrant |
| Trading Symbol | CRU.U |
| Security Exchange Name | NYSE |
| Common Stock Class A [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Class A common stock, par value $0.0001 per share |
| Trading Symbol | CRU |
| Security Exchange Name | NYSE |
| Redeemable warrants to acquire one share of Class A common stock included as part of the Units [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Redeemable warrants, each whole warrant exercisable for one share of Class A common stock at an exercise price of $11.50 |
| Trading Symbol | CRU WS |
| Security Exchange Name | NYSE |
