Note 11 - Stockholders' Equity (Detail) - The following table summarizes outstanding options into groups based upon exercise price ranges: (USD $)	12 Months Ended
	Dec. 31, 2012
Options Exercisable - Weighted Average Maturity (Years)	10 years
Exercise Price Range $2.72 to $3.90 [Member]
Exercise Price Range - Lower	2.72
Exercise Price Range - Upper	3.90
Options Outstanding - Option Shares (in Shares)	4,000
Options Outstanding - Weighted Average Exercise Price	3.885
Options Outstanding - Weighted Average Maturity (Years)	1 year 87 days
Options Exercisable - Option Shares (in Shares)	4,000
Options Exercisable - Weighted Average Exercise Price	3.885
Options Exercisable - Weighted Average Maturity (Years)	1 year 87 days
Exercise Price Range $3.91 to $5.30 [Member]
Exercise Price Range - Lower	3.91
Exercise Price Range - Upper	5.30
Options Outstanding - Option Shares (in Shares)	117,600
Options Outstanding - Weighted Average Exercise Price	4.553
Options Outstanding - Weighted Average Maturity (Years)	4 years 350 days
Options Exercisable - Option Shares (in Shares)	117,600
Options Exercisable - Weighted Average Exercise Price	4.553
Options Exercisable - Weighted Average Maturity (Years)	4 years 350 days
Total [Member]
Options Outstanding - Option Shares (in Shares)	121,600
Options Outstanding - Weighted Average Exercise Price	4.53
Options Outstanding - Weighted Average Maturity (Years)	4 years 302 days
Options Exercisable - Option Shares (in Shares)	121,600
Options Exercisable - Weighted Average Exercise Price	4.53
Options Exercisable - Weighted Average Maturity (Years)	4 years 302 days