Schedule II - Valuation and Qualifying Accounts - Schedule (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
SEC Schedule, 12-09, Allowance, Credit Loss [Member]
Balance at Beginning of Period	$ 19,973	$ 18,325
Charged to Costs and Expenses	55,957	1,648
Deductions	0	0
Balance at End of Period	75,930	19,973
Deductions	0	0
SEC Schedule, 12-09, Reserve, Inventory [Member]
Balance at Beginning of Period	315,345	250,606
Charged to Costs and Expenses	137,262	64,739
Deductions	0	0
Balance at End of Period	452,607	315,345
Deductions	0	0
SEC Schedule, 12-09, Reserve, Warranty [Member]
Balance at Beginning of Period	205,000	302,486
Charged to Costs and Expenses	190,097	253,461
Deductions	364,714	350,947
Balance at End of Period	30,383	205,000
Deductions	(364,714)	(350,947)
SEC Schedule, 12-09, Valuation Allowance, Deferred Tax Asset [Member]
Balance at Beginning of Period	47,319	47,319
Charged to Costs and Expenses	0	0
Deductions	0	0
Balance at End of Period	47,319	47,319
Deductions	0	0
Reserve for Uncertain Tax Positions [Member]
Balance at Beginning of Period	425,000	395,000
Charged to Costs and Expenses	165,000	30,000
Deductions	0	0
Balance at End of Period	590,000	425,000
Deductions	$ 0	$ 0