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Business Risk and Credit Risk Concentration Involving Cash - Summary of Concentrations of Sales for Customers (Details) - Customer concentration risk - Revenue
12 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Post-Production Film Company | Astral    
Concentration Risk [Line Items]    
Concentration risk, percentage   31.00%
MMS Distributor | 1st Detect    
Concentration Risk [Line Items]    
Concentration risk, percentage   69.00%
Global Shipping And Logistics Company | 1st Detect    
Concentration Risk [Line Items]    
Concentration risk, percentage 100.00%