Note 2 - Stock-based Compensation (Details) - Stock Options (USD $) In Thousands, except Share data, unless otherwise specified	6 Months Ended
	Jun. 30, 2014
Stock Options [Abstract]
Outstanding at June 30, 2014	274,500
Outstanding at June 30, 2014	$ 1.72
Outstanding at June 30, 2014	6 years 219 days
Outstanding at June 30, 2014	$ 11,320
Vested and exercisable at June 30, 2014	225,833
Vested and exercisable at June 30, 2014	$ 1.79
Vested and exercisable at June 30, 2014	6 years 36 days
Vested and exercisable at June 30, 2014	$ 10,320