Note 8 - Income Taxes	6 Months Ended
Jun. 30, 2014
Income Tax Disclosure [Abstract]
Income Tax Disclosure [Text Block]	8. Income Taxes The income tax provision for the three and six months ended June 30, 2014 was $0.5 million, or 7.3% of pre-tax income, and $0.8 million, or 4.7% of the pre-tax income, respectively. This differs from the federal statutory rate primarily because the Company’s foreign income was taxed at lower rates, and because of the benefit that the Company realized as a result of stock options exercises and the releases of RSUs and changes in the valuation allowance. The income tax benefit for the three and six months ended June 30, 2013 was $(0.4) million, or (7.0%) of the pre-tax income, and $(0.6) million, or (7.6%) of the pre-tax income, respectively. This differs from the federal statutory rate primarily because the Company’s foreign income was taxed at lower rates, and because of the benefit that the Company realized from the release of an income tax reserve where the statute of limitations expired and from stock option exercises and releases of RSUs. Unrecognized Tax Benefits As of June 30, 2014 and December 31, 2013, the Company had unrecognized tax benefits of approximately $15.5 million and $14.9 million, respectively. As of June 30, 2014 and December 31, 2013, the Company had unrecognized tax benefits of approximately $5.3 million and $5.0 million, respectively, that would result in an adjustment to the Company’s effective tax rate if recognized after considering the valuation allowance. Uncertain tax positions relate to the allocation of income and deductions among the Company’s global entities and to the determination of the research and development tax credit. The Company believes that it is reasonably possible that approximately $1.2 million of its unrecognized tax benefits may be released in 2014 as a result of a lapse of the statute of limitations. In addition, it is reasonably possible that over the next twelve-month period the Company may experience other increases or decreases in its unrecognized tax benefits. However, it is not possible to determine either the magnitude or the range of other increases or decreases at this time. The Company recognizes interest and penalties, if any, related to uncertain tax positions in its income tax provision. As of June 30, 2014 and December 31, 2013, the Company had $0.9 million and $0.8 million, respectively, of accrued interest related to uncertain tax positions. Income Tax Audits The Company is subject to examination of its income tax returns by the IRS and other tax authorities. The Company’s U.S. Federal income tax returns for the years ended December 31, 2005 through December 31, 2007 are under examination by the IRS. In April 2011, the Company received from the IRS a Notice of Proposed Adjustment ("NOPA") relating to a cost-sharing agreement entered into by the Company and its international subsidiaries on January 1, 2004. In the NOPA, the IRS objected to the Company’s allocation of certain litigation expenses between the Company and its international subsidiaries and the amount of "buy-in payments" made by the international subsidiaries to the Company in connection with the cost-sharing agreement, and proposed to increase the Company’s U.S. taxable income according to a few alternative methodologies. In February 2012, the Company received a revised NOPA from the IRS (“Revised NOPA”). In this Revised NOPA, the IRS raised the same issues as in the NOPA issued in April 2011 but under a different methodology. Under the Revised NOPA, the largest potential federal income tax adjustment, if the IRS were to prevail on all matters in dispute, is $10.5 million, plus interest and penalties, if any. The Company responded to the IRS Revised NOPA in May 2012. In June 2013, the IRS responded and continued to disagree with the Company’s rebuttal. The Company met with the IRS Office of Appeals in March and May 2014. However, no resolutions were reached in those meetings, and both parties are scheduled to meet again in September 2014. Meanwhile, the Company agreed to grant the IRS an extension of the statute of limitations for taxable years 2005 through 2007 to September 30, 2015. The IRS also audited the research and development credits carried forward into year 2005 and the credits generated in the years 2005 through 2007. The Company received a NOPA from the IRS in February 2011, proposing to reduce the research and development credits generated in year 2005 through 2007 and the carryforwards, which would then reduce the value of such credits carried forward to subsequent tax years. The Company reviewed and responded to the above proposed adjustments. The Company regularly assesses the likelihood of an adverse outcome resulting from such examinations to determine the adequacy of its provision for income taxes. As of June 30, 2014, based on the technical merits of its tax return filing positions and the interactions to date with the IRS, the Company believes that it is more-likely-than-not that the resolution of the audits will not have a material impact on the Company’s consolidated financial position, results of operations and cash flows.

Note 8 - Income Taxes

6 Months Ended

Jun. 30, 2014

8. Income Taxes

The income tax provision for the three and six months ended June 30, 2014 was $0.5 million, or 7.3% of pre-tax income, and $0.8 million, or 4.7% of the pre-tax income, respectively. This differs from the federal statutory rate primarily because the Company’s foreign income was taxed at lower rates, and because of the benefit that the Company realized as a result of stock options exercises and the releases of RSUs and changes in the valuation allowance.

The income tax benefit for the three and six months ended June 30, 2013 was $(0.4) million, or (7.0%) of the pre-tax income, and $(0.6) million, or (7.6%) of the pre-tax income, respectively. This differs from the federal statutory rate primarily because the Company’s foreign income was taxed at lower rates, and because of the benefit that the Company realized from the release of an income tax reserve where the statute of limitations expired and from stock option exercises and releases of RSUs.

Unrecognized Tax Benefits

As of June 30, 2014 and December 31, 2013, the Company had unrecognized tax benefits of approximately $15.5 million and $14.9 million, respectively. As of June 30, 2014 and December 31, 2013, the Company had unrecognized tax benefits of approximately $5.3 million and $5.0 million, respectively, that would result in an adjustment to the Company’s effective tax rate if recognized after considering the valuation allowance.

Uncertain tax positions relate to the allocation of income and deductions among the Company’s global entities and to the determination of the research and development tax credit. The Company believes that it is reasonably possible that approximately $1.2 million of its unrecognized tax benefits may be released in 2014 as a result of a lapse of the statute of limitations. In addition, it is reasonably possible that over the next twelve-month period the Company may experience other increases or decreases in its unrecognized tax benefits. However, it is not possible to determine either the magnitude or the range of other increases or decreases at this time.

The Company recognizes interest and penalties, if any, related to uncertain tax positions in its income tax provision. As of June 30, 2014 and December 31, 2013, the Company had $0.9 million and $0.8 million, respectively, of accrued interest related to uncertain tax positions.

Income Tax Audits

The Company is subject to examination of its income tax returns by the IRS and other tax authorities. The Company’s U.S. Federal income tax returns for the years ended December 31, 2005 through December 31, 2007 are under examination by the IRS. In April 2011, the Company received from the IRS a Notice of Proposed Adjustment ("NOPA") relating to a cost-sharing agreement entered into by the Company and its international subsidiaries on January 1, 2004. In the NOPA, the IRS objected to the Company’s allocation of certain litigation expenses between the Company and its international subsidiaries and the amount of "buy-in payments" made by the international subsidiaries to the Company in connection with the cost-sharing agreement, and proposed to increase the Company’s U.S. taxable income according to a few alternative methodologies. In February 2012, the Company received a revised NOPA from the IRS (“Revised NOPA”). In this Revised NOPA, the IRS raised the same issues as in the NOPA issued in April 2011 but under a different methodology. Under the Revised NOPA, the largest potential federal income tax adjustment, if the IRS were to prevail on all matters in dispute, is $10.5 million, plus interest and penalties, if any. The Company responded to the IRS Revised NOPA in May 2012. In June 2013, the IRS responded and continued to disagree with the Company’s rebuttal. The Company met with the IRS Office of Appeals in March and May 2014. However, no resolutions were reached in those meetings, and both parties are scheduled to meet again in September 2014. Meanwhile, the Company agreed to grant the IRS an extension of the statute of limitations for taxable years 2005 through 2007 to September 30, 2015.

The IRS also audited the research and development credits carried forward into year 2005 and the credits generated in the years 2005 through 2007. The Company received a NOPA from the IRS in February 2011, proposing to reduce the research and development credits generated in year 2005 through 2007 and the carryforwards, which would then reduce the value of such credits carried forward to subsequent tax years.

The Company reviewed and responded to the above proposed adjustments. The Company regularly assesses the likelihood of an adverse outcome resulting from such examinations to determine the adequacy of its provision for income taxes. As of June 30, 2014, based on the technical merits of its tax return filing positions and the interactions to date with the IRS, the Company believes that it is more-likely-than-not that the resolution of the audits will not have a material impact on the Company’s consolidated financial position, results of operations and cash flows.

- Definition

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.

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