Document And Entity Information - shares |
6 Months Ended | |
|---|---|---|
Jun. 30, 2020 |
Aug. 10, 2020 |
|
| Cover [Abstract] | ||
| Document Type | 10-Q | |
| Amendment Flag | false | |
| Document Period End Date | Jun. 30, 2020 | |
| Document Fiscal Year Focus | 2020 | |
| Document Fiscal Period Focus | Q2 | |
| Entity Registrant Name | 9 METERS BIOPHARMA, INC. | |
| Entity Central Index Key | 0001551986 | |
| Current Fiscal Year End Date | --12-31 | |
| Entity Filer Category | Non-accelerated Filer | |
| Entity Emerging Growth Company | true | |
| Entity Ex Transition Period | true | |
| Entity Small Business | true | |
| Entity Current Reporting Status | Yes | |
| Entity Interactive Data Current | Yes | |
| Entity Shell Company | false | |
| Entity common stock, shares outstanding (in shares) | 138,933,764 |