| Cover | Feb. 15, 2022 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Feb. 15, 2022 |
| Entity File Number | 001-09330 |
| Entity Registrant Name | CoreCard Corporation |
| Entity Central Index Key | 0000320340 |
| Entity Tax Identification Number | 58-1964787 |
| Entity Incorporation, State or Country Code | GA |
| Entity Address, Address Line One | 4355 Shackleford Road |
| Entity Address, City or Town | Norcross |
| Entity Address, State or Province | GA |
| Entity Address, Postal Zip Code | 30093 |
| City Area Code | 770 |
| Local Phone Number | 381-2900 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, $0.01 par value for the class |
| Trading Symbol | CCRD |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
