Note 3 - Fair Value Measurements (Details) - Fair Value of Financial Assets Measured on a Recurring Basis (Fair Value, Measurements, Recurring [Member], Fair Value, Inputs, Level 1 [Member], USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Cash and cash equivalents
Money market mutual fund	$ 14,339	$ 5,524
Total	$ 14,339	$ 5,524