Note 10 - Shareholders' Equity (Detail) - Stock option activity (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Options outstanding	1,790,002	2,145,003	2,541,670
Options outstanding (in Dollars per share)	$ 1.49	$ 1.49	$ 1.57
Options exercisable, December 31, 2012	1,428,335
Options exercisable, December 31, 2012 (in Dollars per share)	$ 1.48
Granted to employees and non-employee directors	0	60,000
Granted to employees and non-employee directors (in Dollars per share)		$ 1.15
Exercised	(6,667)	(13,333)
Exercised (in Dollars per share)	$ 1.23	$ 1.23
Canceled/expired/forfeited	(348,334)	(443,334)
Canceled/expired/forfeited (in Dollars per share)	$ 1.50	$ 1.91