Summary of Significant Accounting Policies (Details Textual) - USD ($)	1 Months Ended	3 Months Ended	6 Months Ended
	Dec. 22, 2017	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Jun. 30, 2018
Summary of Significant Accounting Policies (Textual)
Cash balance at U.S. financial institutions, not insured by the FDIC			$ 2,266,282		$ 6,205,960
Cash balance at U.S. financial institutions, FDIC insured amount			$ 102,303		$ 848,657
Percentage of business tax			5.00%
Percentage of construction taxes			7.00%
Percentage of education surcharges			3.00%
Unexercised options included in the computation of diluted earnings per share		48,011		50,170
Percentage of income tax			25.00%
Corporate tax rates effective during the period, description	The U.S. enacted the “Tax Cuts and Jobs Act” (the “Act”). Under the provisions of the Act, the U.S. corporate tax rate decreased from 35% to 21%. As the Company has a June 30 fiscal year-end, the lower corporate income tax rate will be phased in, resulting in a U.S. statutory federal rate of approximately 28% for our fiscal year ending June 30, 2018, and 21% for subsequent fiscal years.
Compensation paid			The Hong Kong Deposit Protection Board pays compensation up to a limit of HKD $500,000 (approximately $64,000) if the bank with which an individual/a company hold its eligible deposit fails. As of December 31, 2018 and June 30, 2018, cash balance of $75,865 and $9,601, respectively, were maintained at financial institutions in Hong Kong and approximately $64,000 were insured by the Hong Kong Deposit Protection Board.
Sino - China [Member]
Summary of Significant Accounting Policies (Textual)
Percentage of net income			90.00%