Note 11 - Income Taxes	9 Months Ended
Sep. 30, 2016
Notes to Financial Statements
Income Tax Disclosure [Text Block]	11. INCOME TAXES The income tax provision for the three and nine months ended September 30, 2016 was $1.4 million, or 8.9% of the pre-tax income, and $2.7 million, or 6.9% of the pre-tax income, respectively. The effective tax rate differed from the federal statutory rate primarily because foreign income was taxed at lower rates, and because of the benefit that the Company realized from the release of RSUs. In addition, the effective tax rate was impacted by changes in the valuation allowance. The income tax provision for the three months ended September 30, 2015 was $2.1 million, or 15.8% of pre-tax income. The effective tax rate differed from the federal statutory rate primarily because foreign income was taxed at lower rates, and because of the benefit that the Company realized from stock option exercises and the release of RSUs. In addition, the effective tax rate was impacted by changes in the valuation allowance and true-up adjustments. The income tax provision for the nine months ended September 30, 2015 was $5.1 million, or 16.9% of pre-tax income. The Company recorded a one-time net charge of $2.7 million to the income tax provision related to the resolution of the income tax audits in the second quarter of 2015. In addition to the impact of this charge, the effective tax rate differed from the federal statutory rate primarily because foreign income was taxed at lower rates, and because of the benefit that the Company realized from stock option exercises and the release of RSUs, and from the release of an income tax reserve where the statute of limitations expired. In addition, the effective tax rate was impacted by changes in the valuation allowance and true-up adjustments. On July 27, 2015, in Altera Corp. v. Commissioner , the U.S. Tax Court issued an opinion related to the treatment of stock-based compensation expense in an intercompany cost-sharing arrangement. A final decision was issued in December 2015, and the Internal Revenue Service (“IRS”) appealed the decision in February 2016. At this time, the U.S. Department of the Treasury has not withdrawn the requirement from its regulations to include stock-based compensation in an intercompany cost-sharing arrangement. Due to the uncertainty surrounding the status of the current regulations, questions related to the scope of potential benefits, and the risk of the Tax Court’s decision being overturned upon appeal, the Company has not recorded any adjustments as of September 30, 2016. The Company will continue to monitor developments related to this opinion and the potential impact on its financial statements. Unrecognized Tax Benefits As of September 30, 2016, the Company had $14.2 million of unrecognized tax benefits, $3.8 million of which would affect its effective tax rate if recognized after considering the valuation allowance. At December 31, 2015, the Company had $12.1 million of unrecognized tax benefits, $2.7 million of which would affect its 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. It is reasonably possible that over the next twelve-month period, the Company may experience increases or decreases in its unrecognized tax benefits. However, it is not possible to determine either the magnitude or the range of 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 September 30, 2016 and December 31, 2015, the Company has approximately $0.3 million and $0.2 million of accrued interest related to uncertain tax positions, respectively, which were recorded in long-term income tax liabilities in the Condensed Consolidated Balance Sheets. Income Tax Examination The Company is subject to examination of its income tax returns by the IRS and other tax authorities. In May 2016, the IRS notified the Company that its federal income tax return for the year ended December 31, 2014 is under examination. The examination is ongoing and as of September 30, 2016, no adjustments have been proposed by the IRS.

11. INCOME TAXES

The income tax provision for the three and nine months ended September 30, 2016 was $1.4 million, or 8.9% of the pre-tax income, and $2.7 million, or 6.9% of the pre-tax income, respectively. The effective tax rate differed from the federal statutory rate primarily because foreign income was taxed at lower rates, and because of the benefit that the Company realized from the release of RSUs. In addition, the effective tax rate was impacted by changes in the valuation allowance.

The income tax provision for the three months ended September 30, 2015 was $2.1 million, or 15.8% of pre-tax income. The effective tax rate differed from the federal statutory rate primarily because foreign income was taxed at lower rates, and because of the benefit that the Company realized from stock option exercises and the release of RSUs. In addition, the effective tax rate was impacted by changes in the valuation allowance and true-up adjustments.

The income tax provision for the nine months ended September 30, 2015 was $5.1 million, or 16.9% of pre-tax income. The Company recorded a one-time net charge of $2.7 million to the income tax provision related to the resolution of the income tax audits in the second quarter of 2015. In addition to the impact of this charge, the effective tax rate differed from the federal statutory rate primarily because foreign income was taxed at lower rates, and because of the benefit that the Company realized from stock option exercises and the release of RSUs, and from the release of an income tax reserve where the statute of limitations expired. In addition, the effective tax rate was impacted by changes in the valuation allowance and true-up adjustments.

On July 27, 2015, in

Altera Corp. v. Commissioner

, the U.S. Tax Court issued an opinion related to the treatment of stock-based compensation expense in an intercompany cost-sharing arrangement. A final decision was issued in December 2015, and the Internal Revenue Service (“IRS”) appealed the decision in February 2016. At this time, the U.S. Department of the Treasury has not withdrawn the requirement from its regulations to include stock-based compensation in an intercompany cost-sharing arrangement. Due to the uncertainty surrounding the status of the current regulations, questions related to the scope of potential benefits, and the risk of the Tax Court’s decision being overturned upon appeal, the Company has not recorded any adjustments as of September 30, 2016. The Company will continue to monitor developments related to this opinion and the potential impact on its financial statements.

Unrecognized Tax Benefits

As of September 30, 2016, the Company had $14.2 million of unrecognized tax benefits, $3.8 million of which would affect its effective tax rate if recognized after considering the valuation allowance. At December 31, 2015, the Company had $12.1 million of unrecognized tax benefits, $2.7 million of which would affect its 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. It is reasonably possible that over the next twelve-month period, the Company may experience increases or decreases in its unrecognized tax benefits. However, it is not possible to determine either the magnitude or the range of 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 September 30, 2016 and December 31, 2015, the Company has approximately $0.3 million and $0.2 million of accrued interest related to uncertain tax positions, respectively, which were recorded in long-term income tax liabilities in the Condensed Consolidated Balance Sheets.

Income Tax Examination

The Company is subject to examination of its income tax returns by the IRS and other tax authorities. In May 2016, the IRS notified the Company that its federal income tax return for the year ended December 31, 2014 is under examination. The examination is ongoing and as of September 30, 2016, no adjustments have been proposed by the IRS.