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12. Income Taxes (Details 1) - USD ($)
Jun. 30, 2020
Jun. 30, 2019
Deferred tax assets:    
Amortization of intangibles $ 329,700 $ 303,900
Research and development credits 89,400 0
Various accruals 150,700 173,600
Other 19,400 13,300
Gross 589,200 490,800
Deferred tax liability:    
Depreciation of property and amortization of goodwill (52,100) (59,700)
Net deferred tax assets $ 537,100 $ 431,100