Note 15 - Employee Benefit Plan

12 Months Ended

Dec. 31, 2015

Notes to Financial Statements

Compensation and Employee Benefit Plans [Text Block]

15. Employee Benefit Plan

U.S. employees are eligible to participate in the Company’s 401(k) savings plan. Employees may elect to contribute a percentage of their compensation to the plan, and the Company will make matching contributions up to a limit of 5% of an employee’s eligible compensation. In addition, the Company may make annual discretionary contributions. The Company made matching contributions of approximately $350 thousand, $350 thousand, and $362 thousand, for the years ended December 31, 2015, 2014, and 2013, respectively.