Note 17 - Income Taxes (Details Textual) - USD ($)	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
State and Local Jurisdiction [Member] \| Earliest Tax Year [Member]
Open Tax Year	2012
State and Local Jurisdiction [Member] \| Latest Tax Year [Member]
Open Tax Year	2015
Domestic Tax Authority [Member] \| Earliest Tax Year [Member] \| Internal Revenue Service (IRS) [Member]
Open Tax Year	2012
Domestic Tax Authority [Member] \| Latest Tax Year [Member] \| Internal Revenue Service (IRS) [Member]
Open Tax Year	2015
Foreign Tax Authority [Member] \| Earliest Tax Year [Member] \| Ministry of Economic Affairs and Finance, Italy [Member]
Open Tax Year	2011
Foreign Tax Authority [Member] \| Latest Tax Year [Member] \| Ministry of Economic Affairs and Finance, Italy [Member]
Open Tax Year	2015
Internal Revenue Service (IRS) [Member] \| Minimum [Member]
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation	$ 900,000	$ 9,600,000
Internal Revenue Service (IRS) [Member] \| Maximum [Member]
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation			$ 900,000
Unrecognized Tax Benefits, Period Increase (Decrease)	0	0
Operating Loss Carryforwards	6,300,000
Allocated Share-based Compensation Expense	2,200,000	1,600,000	1,300,000
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense	1,100,000	3,100,000	2,000,000
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation	$ 847,000	$ 9,626,000	$ 857,000

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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The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period.

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

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