Income Taxes (Details 2) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Deferred Tax Assets:
Operating Loss Carryforwards	$ 984,000	$ 1,238,000
R&d Tax Credit	2,233,000	1,952,000
Section 263a Costs	38,000	203,000
Amortization	18,000	21,000
Unrealized Loss	442,000	391,000
Asset Reserves:
Bad Debts	11,000	11,000
Inventory Allowance	292,000	118,000
Accrued Expenses:
Non-qualified Stock Options	127,000	175,000
Compensation	116,000	64,000
Warranty	971,000	927,000
Deferred Tax Assets	5,235,000	5,098,000
Less Valuation Allowance	(610)	(98)
Total Deferred Tax Assets	4,625,000	5,000,000
Deferred Tax Liabilities:
Depreciation	(509,000)	(700,000)
Total Deferred Tax Liabilities	(509,000)	(700,000)
Net Deferred Tax Assets (before Unrealized Gain)	4,116,000	4,300
Deferred Tax Liability: Unrealized Gain	0	0
Net Deferred Tax Assets	$ 4,116,000	$ 4,300