Income Taxes (Details Textual) - USD ($)	3 Months Ended	6 Months Ended		12 Months Ended
	Dec. 31, 2017	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Schedule Of Income Tax Disclosure [Line Items]
Deferred Tax Assets, Operating Loss Carryforwards, Domestic		$ 13,200,000		$ 13,200,000
Deferred Tax Assets, Operating Loss Carryforwards, State and Local		$ 7,900,000		7,900,000
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent		21.00%	35.00%
Income Tax Expense (Benefit)	$ 136,386			173,038	$ 36,500	$ 301,431
Revaluation Of Valuation Allowance				$ 136,386
Domestic Tax Authority [Member] | Minimum [Member]
Schedule Of Income Tax Disclosure [Line Items]
Operating Loss Carryforward Expiration Date				2031
Domestic Tax Authority [Member] | Maximum [Member]
Schedule Of Income Tax Disclosure [Line Items]
Operating Loss Carryforward Expiration Date				2038
State and Local Jurisdiction [Member] | Minimum [Member]
Schedule Of Income Tax Disclosure [Line Items]
Operating Loss Carryforward Expiration Date				2018
State and Local Jurisdiction [Member] | Maximum [Member]
Schedule Of Income Tax Disclosure [Line Items]
Operating Loss Carryforward Expiration Date				2038