| Document and Entity Information | Aug. 03, 2021 |
| Document and Entity Information [Abstract] | |
| Document Type | 8-K/A |
| Document Period End Date | Aug. 3, 2021 |
| Entity File Number | 001-38546 |
| Entity Registrant Name | NEURONETICS, INC. |
| Entity Incorporation, State or Country Code | DE |
| Entity Tax Identification Number | 33-1051425 |
| Entity Address State Or Province | PA |
| Entity Address, Address Line One | 3222 Phoenixville Pike |
| Entity Address, City or Town | Malvern |
| Entity Address, Postal Zip Code | 19355 |
| City Area Code | 610 |
| Local Phone Number | 640-4202 |
| Title of 12(b) Security | Common Stock ($0.01 par value) |
| Trading Symbol | STIM |
| Security Exchange Name | NASDAQ |
| 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 |
| Entity Central Index Key | 0001227636 |
| Amendment Flag | true |
| Amendment Description | This Current Report on Form 8-K amends the Current Report on Form 8-K filed by Neuronetics, Inc., or the Company, on August 3, 2021, or the Initial 8-K, to furnish a corrected version of its press release with financial results for the three and six months ended June 30, 2021. The corrected press release, which includes an update to the number of NeuroStar systems sold for the three months ended June 30, 2021 is attached as Exhibit 99.1 hereto and is incorporated by reference herein. Other than updating the number of NeuroStar systems sold for the three months ended June 30, 2021, no changes have been made to the press release attached as Exhibit 99.1 to the Initial 8-K. |
