Note 6 - Fair Value Measurements (Details) - Fair Value of Financial Assets Measured on a Recurring Basis (Fair Value, Inputs, Level 1 [Member], Fair Value, Measurements, Recurring [Member], USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Cash and cash equivalents
Money market mutual fund	$ 5,129	$ 5,524
Total	$ 5,129	$ 5,524