Commitments and contingencies (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Total commitments to extend credit	$ 149,774	$ 136,583
Standby letters of Credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Total commitments to extend credit	1,246	1,202
Undisbursed credit lines
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Total commitments to extend credit	137,230	127,918
Commitments to extend or originate credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Total commitments to extend credit	$ 11,298	$ 7,463