Note 12 - Correction of Immaterial Misstatement to Prior Period Financial Statements (Details Textual) - USD ($)	3 Months Ended	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
General and Administrative Expense, Total		$ 4,626,997	$ 4,050,307
Retained Earnings (Accumulated Deficit), Ending Balance	$ (53,021,469)	(63,107,945)	(53,021,469)
Operating Expenses, Total		$ 7,861,379	6,053,523
Overstatement of Investors Stock Compensation Expense and Additional Paid-in Capital [Member]
Quantifying Misstatement in Current Year Financial Statements, Amount			2,150,097
Overstatement of Investors Stock Compensation Expense and Additional Paid-in Capital [Member] | Restatement Adjustment [Member]
General and Administrative Expense, Total	(2,150,097)
Retained Earnings (Accumulated Deficit), Ending Balance	(2,150,097)		(2,150,097)
Understatement of Employee Stock Compensation Expenses and Additional Paid-in Capital [Member]
Quantifying Misstatement in Current Year Financial Statements, Amount			406,522
Understatement of Employee Stock Compensation Expenses and Additional Paid-in Capital [Member] | Restatement Adjustment [Member]
Retained Earnings (Accumulated Deficit), Ending Balance	$ 406,522		406,522
Operating Expenses, Total			406,522
Understatement of Deferred Tax Assets [Member]
Quantifying Misstatement in Current Year Financial Statements, Amount			$ 767,000