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Income Taxes - Deferred taxes (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Income Taxes
Net operating loss carry forwards	$ 14,620,000	$ 13,216,000
Accrued liabilities	90,000	217,000
Stock compensation	120,000	(48,000)
Depreciation	(10,000)	145,000
Prepaid expenses	20,000	(21,000)
Other	(10,000)	(4,000)
Deferred tax assets, net	14,830,000	13,505,000
Valuation allowance	(14,830,000)	(13,505,000)
Net deferred tax asset	$ 0	$ 0

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