Prepaid expenses and other current assets (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Refunds and other receivables	$ 1,309	$ 648
Prepaid expenses	2,188	1,889
Other current assets	970	981
Total prepaid and other current assets	$ 4,467	$ 3,518