Note 2 - Stock-based Compensation (Details) - Stock Options (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014
Stock Options [Abstract]
Outstanding at March 31, 2014	270,500
Outstanding at March 31, 2014	$ 1.75
Outstanding at March 31, 2014	6 years 146 days
Outstanding at March 31, 2014	$ 36,230
Vested and exercisable at March 31, 2014	194,167
Vested and exercisable at March 31, 2014	$ 1.83
Vested and exercisable at March 31, 2014	5 years 292 days
Vested and exercisable at March 31, 2014	$ 26,073