| Document and Entity Information | Aug. 12, 2021 |
| Document and Entity Information [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Aug. 12, 2021 |
| Entity Registrant Name | CPI CARD GROUP INC. |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-37584 |
| Entity Tax Identification Number | 26-0344657 |
| Entity Address, Address Line One | 10368 W Centennial Road |
| Entity Address, City or Town | Littleton |
| Entity Address State Or Province | CO |
| Entity Address, Postal Zip Code | 80127 |
| City Area Code | 720 |
| Local Phone Number | 681-6304 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, $0.001 par value |
| Trading Symbol | PMTS |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0001641614 |
| Amendment Flag | false |
