Income Taxes (Details) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Deferred tax amounts included in balance sheet
U.S. federal income tax rate (as a percent)			21.00%		35.00%
Income tax expense (benefit)	$ 39,542	$ (44,934)	$ 19,126	$ (267,857)
Effective tax rate (as a percent)			56.70%	35.60%
Federal net operating loss carryforwards	141,000		$ 141,000
State net operating loss carryforwards	61,000		61,000
Valuation allowance	91,000		91,000
Unrecognized tax benefits	0		0		$ 0
Federal
Deferred tax amounts included in balance sheet
Research and development credit	27,000		27,000
State
Deferred tax amounts included in balance sheet
Research and development credit	$ 115,000		$ 115,000