Note Receivable	9 Months Ended
Sep. 30, 2021
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]
Note Receivable	8. NOTE RECEIVABLE On September 29, 2021, Neuronetics, Inc. the Company entered into an exclusive, five-year master sales agreement (the “Commercial Agreement”) with Check Five, LLC d/b/a Success TMS (“Success TMS”). In connection with the Commercial Agreement, the Company agreed to loan Success TMS the principal amount of $10.0 million for a period of five years pursuant to a secured promissory note (the “Note”). The Note will bear interest at a floating rate equal to the prime rate plus 6.00% per annum. The Note includes an interest-only period through October 1, 2022, after which time Success TMS will be required to make monthly payments of principal and interest. The interest-only period can be extended by the Company to October 1, 2023 upon satisfaction of certain conditions by Success TMS after which time Success TMS will be required to make payments of principal and interest. Under the terms of the Note, the Company has received a first priority security interest in substantially all of the assets of Success TMS. Success TMS has also granted the Company an observer seat on the Board of Managers of Success TMS. In the Note, Success TMS has made certain representations and warranties and is required to comply with certain customary affirmative and negative covenants during the term of the Note. The Note contains events of default, including, without limitation: (i) failure to make payment pursuant to the terms of the Note; (ii) violation of covenants; (iii) breach of any representation or warranty; (iv) breach or default under the Commercial Agreement; (v) material adverse changes to Success TMS’s business; (vi) any impairment of the Company’s security interest in collateral; (vii) attachment or levy on Success TMS’s assets or judicial restraint on its business; (viii) commencement of insolvency proceedings; (ix) material cross-defaults; (x) significant judgments, orders or awards for payment against Success TMS; (xi) a change of control of Success TMS; and (xii) the invalidity or unenforceability of the Note or the Commercial Agreement. The owner of Success TMS, 6214 Riverwalk LLC, has provided a limited guarantee and pledge of its equity in Success TMS in connection with the Note. As of September 30, 2021, Success TMS has represented to the Company that Success TMS is in compliance with all covenants of the Note.

Note Receivable

9 Months Ended

Sep. 30, 2021

Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]

8. NOTE RECEIVABLE

On September 29, 2021, Neuronetics, Inc. the Company entered into an exclusive, five-year master sales agreement (the “Commercial Agreement”) with Check Five, LLC d/b/a Success TMS (“Success TMS”). In connection with the Commercial Agreement, the Company agreed to loan Success TMS the principal amount of $10.0 million for a period of five years pursuant to a secured promissory note (the “Note”). The Note will bear interest at a floating rate equal to the prime rate plus 6.00% per annum. The Note includes an interest-only period through October 1, 2022, after which time Success TMS will be required to make monthly payments of principal and interest. The interest-only period can be extended by the Company to October 1, 2023 upon satisfaction of certain conditions by Success TMS after which time Success TMS will be required to make payments of principal and interest. Under the terms of the Note, the Company has received a first priority security interest in substantially all of the assets of Success TMS. Success TMS has also granted the Company an observer seat on the Board of Managers of Success TMS.

In the Note, Success TMS has made certain representations and warranties and is required to comply with certain customary affirmative and negative covenants during the term of the Note. The Note contains events of default, including, without limitation: (i) failure to make payment pursuant to the terms of the Note; (ii) violation of covenants; (iii) breach of any representation or warranty; (iv) breach or default under the Commercial Agreement; (v) material adverse changes to Success TMS’s business; (vi) any impairment of the Company’s security interest in collateral; (vii) attachment or levy on Success TMS’s assets or judicial restraint on its business; (viii) commencement of insolvency proceedings; (ix) material cross-defaults; (x) significant judgments, orders or awards for payment against Success TMS; (xi) a change of control of Success TMS; and (xii) the invalidity or unenforceability of the Note or the Commercial Agreement. The owner of Success TMS, 6214 Riverwalk LLC, has provided a limited guarantee and pledge of its equity in Success TMS in connection with the Note.

As of September 30, 2021, Success TMS has represented to the Company that Success TMS is in compliance with all covenants of the Note.