Notes Receivable	3 Months Ended
Mar. 31, 2023
Accounts Notes, Loans And Financing, Receivable, Gross, Allowance, And Net [Abstract]
Notes Receivable	8. NOTES RECEIVABLE Greenbrook TMS Inc On March 31, 2023, the Company entered into a Secured Promissory Note and Guaranty Agreement (the “Promissory Note”) with TMS Neurohealth Centers Inc. (the “Maker”) and Greenbrook TMS Inc. and its subsidiaries, excluding the Maker (the “Guarantors”), in the principal amount of $6.0 million for a period of four years. The Promissory Note will bear interest at a rate equal to the sum of (a) the floating interest rate of daily secured overnight financing rate as administered by the Federal Reserve Bank of New York on its website (“SOFR”) plus (b) 7.65%. Pursuant to the terms of the Promissory Note, in the event of an event of default thereunder, the Maker will be required to issue common share purchase warrants to the Company equal to (i) 200% of the unpaid amount of any delinquent amount or payment due and payable under the Promissory Note, together with all outstanding and unpaid accrued interest, fees, charges and costs, divided by (ii) the exercise price of the warrants, which will represent a 20% discount to the 30-day volume-weighted average closing price of the Company’s common shares traded on the Nasdaq Stock Market (“Nasdaq”) prior to the date of issuance (subject to any limitations that may be required by Nasdaq). Under the Promissory Note and related loan documents, the Maker and the Guarantors have granted to the Company a security interest in substantially all of the Maker and the Guarantors’ assets and the Guarantors have guaranteed the Maker’s obligations under the Promissory Note. The Company’s security interest pursuant to the Promissory Note and related loan documents ranks pari passu with the Maker’s senior lender, Madryn Fund Administration, LLC, and is subject to an intercreditor agreement. Success TMS On September 29, 2021, the Company entered into an exclusive, five-year master sales agreement with Check Five LLC doing business as 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 included interest at a floating rate equal to the prime rate plus 6.00% per annum and interest-only period through October 1, 2022, after which time Success TMS was required to make monthly payments of principal and interest. On July 14, 2022, Success TMS repaid in full the Note with a cash payment of $10.5 million, which included all outstanding principal, prepayment premium and accrued but unpaid interest. The repayment extinguished the Note in its entirety and terminated the Subordination Agreement entered into by the Company. Interest income recognized by the Company was $0.6 million and $0.2 million for the three months ended March 31, 2023 and 2022 respectively.

Notes Receivable

3 Months Ended

Mar. 31, 2023

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

8. NOTES RECEIVABLE

Greenbrook TMS Inc

On March 31, 2023, the Company entered into a Secured Promissory Note and Guaranty Agreement (the “Promissory Note”) with TMS Neurohealth Centers Inc. (the “Maker”) and Greenbrook TMS Inc. and its subsidiaries, excluding the Maker (the “Guarantors”), in the principal amount of $6.0 million for a period of four years.

The Promissory Note will bear interest at a rate equal to the sum of (a) the floating interest rate of daily secured overnight financing rate as administered by the Federal Reserve Bank of New York on its website (“SOFR”) plus (b) 7.65%.

Pursuant to the terms of the Promissory Note, in the event of an event of default thereunder, the Maker will be required to issue common share purchase warrants to the Company equal to (i) 200% of the unpaid amount of any delinquent amount or payment due and payable under the Promissory Note, together with all

outstanding and unpaid accrued interest, fees, charges and costs, divided by (ii) the exercise price of the warrants, which will represent a 20% discount to the 30-day volume-weighted average closing price of the Company’s common shares traded on the Nasdaq Stock Market (“Nasdaq”) prior to the date of issuance (subject to any limitations that may be required by Nasdaq).

Under the Promissory Note and related loan documents, the Maker and the Guarantors have granted to the Company a security interest in substantially all of the Maker and the Guarantors’ assets and the Guarantors have guaranteed the Maker’s obligations under the Promissory Note. The Company’s security interest pursuant to the Promissory Note and related loan documents ranks pari passu with the Maker’s senior lender, Madryn Fund Administration, LLC, and is subject to an intercreditor agreement.

Success TMS

On September 29, 2021, the Company entered into an exclusive, five-year master sales agreement with Check Five LLC doing business as 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 included interest at a floating rate equal to the prime rate plus 6.00% per annum and interest-only period through October 1, 2022, after which time Success TMS was required to make monthly payments of principal and interest.

On July 14, 2022, Success TMS repaid in full the Note with a cash payment of $10.5 million, which included all outstanding principal, prepayment premium and accrued but unpaid interest. The repayment extinguished the Note in its entirety and terminated the Subordination Agreement entered into by the Company.

Interest income recognized by the Company was $0.6 million and $0.2 million for the three months ended March 31, 2023 and 2022 respectively.