v3.25.1

DEBT- Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands	Nov. 10, 2023	Mar. 31, 2025	Dec. 31, 2024	Mar. 31, 2024
Debt Instrument, Redemption [Line Items]
Fair value of bifurcated embedded derivatives		$ 780	$ 970
Common Stock Warrants \| Common Stock
Debt Instrument, Redemption [Line Items]
Warrants (in shares)	730,769
Term Loan \| Secured Debt
Debt Instrument, Redemption [Line Items]
Borrowing capacity	$ 50,000
Interest rate	9.65%
Variable interest rate	1.15%
Final payment fee	$ 1,600	1,635	1,635
Minimum required payment (more than)	5,000
Minimum required payment, outstanding debt requirement (at least)	15,000
Conversion, if-converted amount	$ 2,500
Conversion price (in dollars per share)	$ 2.53
Direct fees	$ 500
Fair value of bifurcated embedded derivatives	1,200	$ 780	$ 970
Discount	4,400
Effective interest rate during period		14.00%		13.40%
Term Loan \| Secured Debt \| Common Stock Warrants
Debt Instrument, Redemption [Line Items]
Warrant, fair value	$ 1,100
Term Loan \| Secured Debt \| Common Stock Warrants \| Common Stock
Debt Instrument, Redemption [Line Items]
Warrants (in shares)	730,769
Term Loan, First Tranche \| Secured Debt
Debt Instrument, Redemption [Line Items]
Borrowing capacity	$ 30,000
Term Loan, Second Tranche \| Secured Debt
Debt Instrument, Redemption [Line Items]
Borrowing capacity	20,000
Covenant, proceeds from issuance of debt required (at least)	$ 20,000

Debt Instrument, Convertible, If-converted Value

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Debt Instrument, Minimum Required Payment

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Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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The price per share of the conversion feature embedded in the debt instrument.

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Amount of the fee that accompanies borrowing money under the debt instrument.

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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of unamortized debt discount (premium) and debt issuance costs.

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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Fair value as of the balance sheet date of the embedded derivative or group of embedded derivatives classified as a liability.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Value of outstanding derivative securities that permit the holder the right to purchase securities (usually equity) from the issuer at a specified price.

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Acumen Pharmaceuticals, Inc. 10-Q