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Income Taxes (Details 3)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Taxes
Statutory rate	26.50%	26.50%	26.50%
State tax	18.20%	11.40%	7.40%
Permanent differences	(2.00%)	0.50%	(3.60%)
True-ups and other	0.80%	(6.30%)	9.20%
Canada statutory rate addition	(4.20%)	(4.00%)	(8.30%)
Change in valuation allowance	(39.30%)	(28.10%)	(31.20%)
Total	0.00%	0.00%	0.00%

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to statutory income tax expense (benefit) outside of the country of domicile.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to state and local income tax expense (benefit), net of federal tax expense (benefit).

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