Income Taxes (Details 1) - USD ($)	Mar. 31, 2023	Dec. 31, 2022
Income Taxes
Inventory allowance	$ 0	$ 61,000
Allowance for doubtful accounts	1,000	1,000
Stock based compensation	138,000	149,000
Deferred wages payable	30,000	21,000
Depreciation - property, plant and equipment	0	(19,000)
Research and development credits	26,000	24,000
Net operating loss carry-forward	2,482,000	2,972,000
Total gross deferred income tax assets	2,677,000	3,209,000
Less deferred income tax assets valuation allowance	(2,677,000)	(3,209,000)
Net deferred income tax assets	$ 0	$ 0