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Note 10 - Income Taxes (Details Textual) - USD ($) | 3 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Jun. 30, 2018 | Dec. 31, 2017 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | Sep. 30, 2019
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability |  | $ 2,474,000 |  |  |  | $ 2,503,000 |  |
Income Tax Expense (Benefit), Excluding Adjustment of Deferred Tax (Asset) Liability |  |  |  |  |  | $ 290,590 |  |
Effective Income Tax Rate Reconciliation, Percent, Total |  |  |  |  |  | 20.05% | 41.90% |
Income Tax Expense (Benefit), Total | $ (73,749) |  | $ (435,726) | $ 2,793,590 | $ (752,969) | $ 2,793,590 | $ (752,969) |
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense, Total |  |  |  |  |  | $ 0 |  |
Scenario, Forecast [Member] |  |  |  |  |  |  |  |
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent |  |  |  |  |  |  |  | 21.00%

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- Definition Represents the amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations, excluding any amount of income tax expense (benefit) from continuing operations attributable to an adjustment of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity. + References No definition available. + Details
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