Income taxes (Details) $ in Millions	12 Months Ended
	Dec. 31, 2021 USD ($)
Income Tax Disclosure [Abstract]
U.S. federal net operating loss	$ 20.8
Taxable income	$ 9.1
Taxable income percentage	80.00%
Net change in valuation allowance	$ 10.7
Net change in valuation allowance	$ 6.0