Leases - Components of lease cost (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Leases
Operating lease costs	$ 656,130	$ 773,756
Short-term lease costs	79,606	5,518
Lease costs - discontinued operations	31,281	127,983
Total lease costs	$ 767,017	$ 907,257