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Stockholders' equity (Details) - USD ($) $ / shares in Units, $ in Thousands			6 Months Ended
	May 09, 2024	May 13, 2023	Jun. 30, 2024	Mar. 27, 2023	Feb. 08, 2023	Nov. 09, 2022
Class of Warrant or Right [Line Items]
Class of warrant or right, exercise price of warrants or rights (usd per share)						$ 0.01
Warrants outstanding (in shares)					12,574,200
Shortfall Warrants
Class of Warrant or Right [Line Items]
Price of warrant (usd per share)				$ 10.00
Gain on reclassification		$ 2,042
Fair value of shares		$ 3,063
Public Warrants and Private Placement Warrants
Class of Warrant or Right [Line Items]
Number of securities called by each warrant (in shares)			1	1
Price of warrant (usd per share)			$ 11.50
Class of warrant or right, exercise price of warrants or rights (usd per share)			$ 11.50
Threshold period days after the completion of the initial Business Combination for exercise of warrants			30 days
Public Warrants and Private Placement Warrants | Redemption of Warrants When the Price per Class A Ordinary Share Equals or Exceeds $18.00
Class of Warrant or Right [Line Items]
Redemption price per public warrant (usd per share)			$ 0.01
Redemption period			30 days
Trigger price (in dollars per share)			$ 18.00
Threshold trading days for redemption of public warrants			20 days
Minimum threshold written notice period for redemption of public warrants			30 days
Public Warrants and Private Placement Warrants | Redemption of Warrants When the Price per Class A Ordinary Share Equals or Exceeds $10.00
Class of Warrant or Right [Line Items]
Redemption price per public warrant (usd per share)			$ 0.10
Redemption period			30 days
Trigger price (in dollars per share)			$ 10.00
Public warrants
Class of Warrant or Right [Line Items]
Warrants outstanding (in shares)			7,499,924		7,499,924
Private placement warrants
Class of Warrant or Right [Line Items]
Warrants outstanding (in shares)			4,774,276		4,774,276
ACM | Shortfall Warrants
Class of Warrant or Right [Line Items]
Warrants issued (in shares)				2,073,486
Vellar Opportunity Fund SPV LLC - Series 10 | Shortfall Warrants
Class of Warrant or Right [Line Items]
Warrants issued (in shares)				2,010,000
At Market Issuance Sales
Class of Warrant or Right [Line Items]
Purchase price	$ 100,000
At Market Issuance Sales | B. Riley Securities
Class of Warrant or Right [Line Items]
Sale of stock, daily limit	180
Sale of stock, weekly limit	900
Sale of stock, yearly limit	$ 40,000
Sale of stock, gross sales commission	3.00%
Sale of stock, purchase price sold, commission	5.00%

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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