Note 8 - Shareholders' Equity (Tables)

12 Months Ended

Dec. 31, 2012

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

Exercise Price				Options outstanding as of December 31, 2012		Weighted average remaining contractual term		Weighted average exercise price		Options exercisable as of December 31, 2012		Weighted average exercise price of options exercisable
						Years
	$0.48	-	$ 0.71		60,763		8.06	$	0.69		20,763	$	0.70
	$0.79	-	$ 1.05		205,000		3.26	$	0.94		205,000	$	0.94
	$1.10	-	$ 1.66		487,000		6.83	$	1.45		279,750	$	1.39
	$1.69	-	$ 1.79		80,000		7.19	$	1.75		45,000	$	1.77
					832,763		6.08	$	1.30		550,513	$	1.24

Schedule of Share-based Compensation, Activity [Table Text Block]

Issuance date	Options for Common shares		Exercise price per share		Options exercisable
February 2005		20,000	$	1.19		20,000
March 2006		100,000	$	1.16		100,000
December 2010		41,500	$	1.51		20,750
		161,500				140,750