XML 46 R61.htm IDEA: XBRL DOCUMENT v3.19.3
Employee Post-Retirement Benefits (Details) - USD ($)
 12 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2017
Employee post-retirement benefits (Textual)      
Defined contribution plan, description The Company offers a defined contribution plan to eligible employees which consists of two parts: (i) the first part, paid by the Company, is 20% of the employee's compensation from the prior year and (ii) the second part, paid by the employee, is 8% of the employee's compensation.    
Employment benefits contributions amount $ 500,000 $ 500,000 $ 700,000