Commitments and contingencies (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Mar. 10, 2021 ft²	Feb. 01, 2020
Operating leases:
Operating lease cost	$ 99,142	$ 99,142	$ 297,247	$ 284,415
Variable lease cost	16,672	24,948	59,023	77,099
Operating lease expense	115,814	124,090	356,270	361,514
Lease income - sub lease	(115,281)	(106,435)	(328,803)	(317,998)
Net rent expense	$ 533	$ 17,655	27,467	43,516
Operating cash flows - operating leases			$ 303,820	273,313
Right-of-use assets obtained in exchange for operating lease liabilities				$ 122,809
Weighted-average remaining lease term - operating leases	1 year 2 months 12 days	2 years 1 month 6 days	1 year 2 months 12 days	2 years 1 month 6 days
Weighted-average discount rate - operating leases	14.40%	14.10%	14.40%	14.10%
Office spare leased | ft²					3,127
Lease term					24 months	4 years
Security deposit	$ 13,000		$ 13,000
First 12 months
Operating leases:
Base rent per month			4,690.50
Remaining 12 months
Operating leases:
Base rent per month			$ 6,514.58