Note 5 - Accrued Expenses - Accrued Expenses (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Payroll and employee-related costs	$ 1,139	$ 1,058
Contracted service costs	2,891	1,040
Professional fees and other	493	478
Total	$ 4,523	$ 2,576