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Note 12 - Income Taxes - Table of Estimated Deferred Tax Assets and Liabilities (Details) - USD ($)
Jun. 30, 2021
Jun. 30, 2020
NOL Carryforwards (Federal and State) $ 11,784,000 $ 11,975,000
Stock-based compensation 5,350,000 5,073,000
Impairment 1,340,000 1,340,000
Business interest 264,000 217,000
Deferred compensation 986,000 1,194,000
Gross deferred tax assets 19,724,000 19,799,000
Valuation allowance (19,724,000) (19,799,000)
Net deferred tax assets