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Taxes (Details 1) - USD ($)
Sep. 30, 2019
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2017
Deferred tax assets:        
Allowance for doubtful accounts $ 290,270 $ 197,962    
Inventory reserve 263,485 228,893    
Net operating loss carry-forwards 499,906 519,671    
Total 1,053,661 946,526    
Valuation allowance (499,906) (539,061) $ (519,671) $ (111,882)
Total deferred tax assets 553,755 426,855    
Deferred tax liability:        
Distribution rights (258,464) (268,684)    
Total deferred tax liability (258,464) (268,684)    
Deferred tax liability, net