Income taxes (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Mar. 31, 2026	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Effective Income Tax Rate Reconciliation [Line Items]
Income tax expense (benefit)		$ 82	$ (80)	$ 222	$ (62)
Effective income tax rate reconciliation, percent				(1.40%)
Tax expense (benefit), share-based payment arrangement, amount				$ (700)
Income tax rate, percent				21.00%
Operating loss carryforward		$ 56,800		$ 56,800
CANADA
Effective Income Tax Rate Reconciliation [Line Items]
Effective income tax rate reconciliation, percent				0.00%
Forecast
Effective Income Tax Rate Reconciliation [Line Items]
Income tax rate, without discrete items, percent	(1.50%)