Commitments - Operating leases, components of lease expense (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Commitments and Contingencies Disclosure [Abstract]
Operating lease cost	$ 47,696	$ 47,696	$ 142,947	$ 202,665
Variable lease cost	21,169	21,284	62,415	58,163
Total lease cost	$ 68,865	$ 68,980	$ 205,362	$ 260,828