Summary of Significant Accounting Policies (Details Textual) - USD ($) |
3 Months Ended | 9 Months Ended | |||
|---|---|---|---|---|---|
Mar. 31, 2018 |
Mar. 31, 2017 |
Mar. 31, 2018 |
Mar. 31, 2017 |
Jun. 30, 2017 |
|
| Summary of Significant Accounting Policies (Textual) | |||||
| Cash balance at U.S. financial institutions, not insured by the FDIC | $ 7,413,222 | $ 7,413,222 | $ 6,246,337 | ||
| Cash balance at U.S. financial institutions, FDIC insured amount | $ 2,077,680 | $ 2,077,680 | $ 2,462,792 | ||
| Percentage of business tax | 5.00% | ||||
| VAT rate, description | Enterprises or individuals who sell commodities, engage in services or selling of goods in the PRC are subject to a value added tax ("VAT") in accordance with PRC laws. All of the Company's revenue generated in the PRC are subject to a VAT on the gross sales price. The VAT rates are 6% and 11%, depending on the type of services provided. | ||||
| Percentage of construction taxes | 7.00% | ||||
| Percentage of education surcharges | 3.00% | ||||
| Unexercised options included in the computation of diluted earnings per share | 34,686 | 34,782 | 46,283 | 20,621 | |
| Percentage of income tax | 25.00% | ||||
| Corporate tax rates effective during the period, description | 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. | ||||
| Reclassified revenue | $ 504,815 | ||||
| Cost of revenue | $ 504,815 | ||||
| Sino-China's [Member] | |||||
| Summary of Significant Accounting Policies (Textual) | |||||
| Percentage of net income | 90.00% | ||||