Note 4 - Accounting for Stock-Based Compensation (Detail) - Stock Option Plan Activity (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Outstanding at the beginning of the period	832,763
Outstanding at the beginning of the period (in Dollars per share)	$ 1.30
Outstanding at the beginning of the period	6 years 29 days
Outstanding at the beginning of the period (in Dollars)	$ 1	[1]
Outstanding at the end of the period	832,763
Outstanding at the end of the period (in Dollars per share)	$ 1.30
Outstanding at the end of the period	6 years 29 days
Outstanding at the end of the period (in Dollars)		[1]
Exercisable options at the end of the period	599,638
Exercisable options at the end of the period (in Dollars per share)	$ 1.26
Exercisable options at the end of the period	4 years 317 days
Exercisable options at the end of the period (in Dollars)		[1]

[1] Calculation of aggregate intrinsic value is based on the share price of the Company's common stock as of March 31, 2013 ($ 0.68 per share).