7. Income taxes	3 Months Ended
7. Income taxes	Mar. 31, 2014
Income Tax Disclosure [Abstract]
Income Tax Disclosure [Text Block]	7. Income taxes We recorded an income tax provision for the first quarter of 2014 of $215,000 at an effective tax rate of 35.3%, compared to an income tax provision during the first quarter of 2013 of $278,000 at an effective tax rate of 19.3%. Our effective tax rate for the first three months of 2013 was unusually low because it included the full-year benefit from the 2012 federal research and development credit (“R&D credit”) of approximately $220,000 as this credit was not renewed until January 2, 2013 as a component of the American Taxpayer Relief Act of 2012. We are subject to U.S. federal income tax as well as income tax of certain state and foreign jurisdictions. We have substantially concluded all U.S. federal income tax, state and local, and foreign tax matters through 2009. During 2008, a limited scope examination of our 2005 and 2006 federal tax returns was completed and during 2013, an examination of our 2010 federal tax return was completed. However, our federal tax returns for the years 2010 through 2012 remain open to examination. Various state and foreign tax jurisdiction tax years remain open to examination as well, though we believe that any additional assessment would be immaterial to the Condensed Consolidated Financial Statements. No state or foreign tax jurisdiction income tax returns are currently under examination. As of March 31, 2014, we had $108,000 of total gross unrecognized tax benefits that, if recognized, would favorably affect the effective income tax rate in any future periods.

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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