7. Leases (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Leases [Abstract]
Operating lease cost	$ 64,869	$ 56,785	$ 190,607	$ 169,931
Amortization of right-of-use assets	17,667	17,667	53,000	53,000
Interest on lease liabilities	3,868	6,315	13,482	20,679
Variable rent expense	8,485	8,485	25,455	25,455
Finance lease cost	$ 30,020	$ 32,467	$ 91,937	$ 99,134