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Income taxes (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Income Taxes Details Abstract
Statutory tax rate	34.00%	34.00%
Expected tax benefit	$ (214,000)	$ (280,000)
Nondeductible expenses	0	0
Increase in valuation allowance	214,000	280,000
Tax provision (benefit) as reported	$ 0	$ 0

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

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Amount 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 attributable to increase (decrease) in the valuation allowance for deferred tax assets.

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Amount 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 attributable to nondeductible expenses.

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Amount of expense for penalties related to a tax position claimed or expected to be claimed in the tax return.

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