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Note 10 - Income Taxes - Effective Income Tax Rate Reconciliation (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income tax (benefit)/expense at federal statutory rate [21%-2018; 34%-2017]			$ (652,837)	$ 2,075,004
Change in other accruals			45,540	90,781
Difference between tax and book depreciation			89,558	(201,847)
Stock-based compensation			201,817	(197,707)
Income tax (benefit)/expense	$ (424,640)	$ 508,316	$ (315,922)	$ 1,766,231

X

- Definition

Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in other accruals.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to nondeductible depreciation.

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