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Note 16 - Income Taxes (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Operating Loss Carryforwards	$ 5,200,000
Allocated Share-based Compensation Expense	3,392,000	$ 2,225,000	$ 1,607,000
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense	1,200,000	1,100,000	3,100,000
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation	647,000	847,000	$ 9,626,000
Unrecognized Tax Benefits	$ 0	$ 0
State and Local Jurisdiction [Member] | Earliest Tax Year [Member]
Open Tax Year	2013
State and Local Jurisdiction [Member] | Latest Tax Year [Member]
Open Tax Year	2016
Domestic Tax Authority [Member] | Earliest Tax Year [Member]
Open Tax Year	2013
Domestic Tax Authority [Member] | Latest Tax Year [Member]
Open Tax Year	2016

X

- Definition

Amount of increase in additional paid in capital (APIC) resulting from a tax benefit associated with share-based compensation plan other than an employee stock ownership plan (ESOP). Includes, but is not limited to, excess tax benefit.

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Tax year that remains open to examination under enacted tax laws, in CCYY format.

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Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

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