Income Taxes - Provision for income taxes (Details) - USD ($)	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Income Taxes
Taxes currently payable	$ 68,865	$ 46,232
Deferred income taxes	18,829	145,046
Income tax expense	$ 87,694	$ 191,278

Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration