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Note 14 - Income Taxes	3 Months Ended
	Mar. 31, 2017
Notes to Financial Statements
Income Tax Disclosure [Text Block]	14.           Income Taxes Provisions for income taxes were $2.6 million and $3.9 million for the three -month periods ended March 31, 2017 and 2016, respectively, based on effective tax rates of 31.9% and 36.1%.   The decrease in income taxes for the three -month period ended March 31, 2017 resulted from lower income before income taxes as compared to the same period in the prior year along with the decrease in the effective tax rate. The net decrease in the effective tax rate for the three -month period ended March 31, 2017, as compared to the same period in 2016, was primarily due to the increase in the expected research and development and state investment tax credits.  In addition, the Company realized windfall tax benefits related to share-based payments in connection with the adoption of ASU 2016 - 09 during the period. The amount of excess tax benefits recognized as a discrete period income tax benefit was $0.3 million which decreased the effective tax rate for the interim period by 4.0%. The Company files income tax returns in the United States on a federal basis, in certain U.S. states, and in Italy. The associated tax filings remain subject to examination by applicable tax authorities for a certain length of time following the tax year to which those filings relate. Substantially all of the Company’s filings from 2013 through the present tax year remain subject to examination by the Internal Revenue Service (“IRS”) and other taxing authorities for U.S. federal and state tax purposes. The Company’s 2014 filing has been audited by the IRS and closed. The Company’s filings from 2011  through the present tax year remain subject to examination by the appropriate governmental authorities in Italy. The Company’s 2012 filing has been audited by the Italian tax authorities and closed. In connection with the preparation of the financial statements, the Company performed an analysis to ascertain if it was more likely than not that it would be able to utilize, in future periods, the net deferred tax assets associated with its net operating loss carry-forward. The Company has concluded that the positive evidence outweighs the negative evidence and, thus, that the deferred tax assets not otherwise subject to a valuation allowance are realizable on a “more likely than not” basis. As such, the Company has did not record a valuation allowance at March 31, 2017 or December 31, 2016.

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The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-URI http://asc.fasb.org/topic&trid=2144680

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