Note 4 - Accounting for Stock-based Compensation (Details) - Option Activity (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2014		Dec. 31, 2013
Option Activity [Abstract]
Amount of options			712,763
Weighted average exercise price			$ 1.33
Weighted-average remaining contractual term	5 years 62 days		5 years 138 days
Aggregate intrinsic value				[1]
Exercisable options at the end of the period	560,263
Exercisable options at the end of the period	$ 1.31
Exercisable options at the end of the period	4 years 270 days
Exercisable options at the end of the period	219	[1]
Amount of options	700,763
Weighted average exercise price	$ 1.33
Weighted-average remaining contractual term	5 years 62 days		5 years 138 days
Aggregate intrinsic value	$ 252	[1]

[1] Calculation of aggregate intrinsic value is based on the share price of the Company's common stock as of March 31, 2014 ($ 1.68 per share).