Related party transactions (Details) - Broadband services agreement - USD ($)	3 Months Ended	6 Months Ended
Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021	Nov. 30, 2015
Related Party Transaction [Line Items]
Monthly cash fee payment						$ 20,000
Related party transaction, expenses	$ 100,000	$ 100,000	$ 100,000	$ 100,000
Due to related party	$ 100,000		$ 100,000		$ 0

Carrying amount as of the balance sheet date of obligations due all related parties.

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+ Details