Schedule of lease costs recognized in consolidated statements of operations (Details) - USD ($)		3 Months Ended		6 Months Ended
		Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Leases [Abstract]
Operating lease cost included in cost of goods		$ 29,837	$ 38,615	$ 62,701	$ 84,571
Operating lease cost included in operating costs		13,496	13,846	24,592	28,119
Total operating lease cost (1)	[1]	43,333	52,461	87,293	112,690
Finance lease cost, included in cost of goods:
Amortization of lease assets		38,952	17,434	51,586	31,427
Interest on lease liabilities		6,363	4,475	11,830	7,969
Total finance lease cost		45,315	21,909	63,416	39,396
Short-term lease cost		0	8,970	2,300	17,940
Total lease cost		$ 88,648	$ 83,340	$ 153,009	$ 170,026

[1] Right of use asset amortization under operating agreements was $26,558 and $49,846 for the three months ended June 30, 2021 and 2020, respectively. Right of use asset amortization under operating agreements was $67,539 and $95,722 for the six months ended June 30, 2021 and 2020, respectively.