| Cover | Mar. 21, 2024 |
| Cover [Abstract] | |
| Document Type | 8-K/A |
| Amendment Flag | true |
| Amendment Description | This Amendment No. 1 on Form 8-K/A is being filed to amend Item 9.01(a) and (b) of the Current Report on Form 8-K that Bancorp 34 filed with the Securities and Exchange Commission on March 21, 2024 regarding the completion of its acquisition of CBOA to include the historical financial statements of CBOA required by Item 9.01(a) of Form 8-K and the pro forma financial information required by Item 9.01(b) of Form 8-K |
| Document Period End Date | Mar. 21, 2024 |
| Entity File Number | 333-273901 |
| Entity Registrant Name | BANCORP 34, INC. |
| Entity Central Index Key | 0001668340 |
| Entity Tax Identification Number | 74-2819148 |
| Entity Incorporation, State or Country Code | MD |
| Entity Address, Address Line One | 8777 E. Hartford Drive |
| Entity Address, Address Line Two | Suite 100 |
| Entity Address, City or Town | Scottsdale |
| Entity Address, State or Province | AZ |
| Entity Address, Postal Zip Code | 85255 |
| City Area Code | (623) |
| Local Phone Number | 334-6064 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
