Note 13 - Stock Option Plans (Detail) - Stock Options Exercisable (USD $)			12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 Options Exercisable, Exercise Price Range 1 [Member]	Dec. 31, 2012 Options Exercisable, Exercise Price Range 2 [Member]	Dec. 31, 2012 Options Exercisable, Exercise Price Range 3 [Member]
Range of Exercise Price - Lower Range Limit			$ 0.69	$ 2.96	$ 1.51
Range of Exercise Price - Upper Range Limit			$ 2.08	$ 4.26	$ 4.26
Number Exercisable (in Shares)	220,833	172,000	196,833	24,000	220,833
Wgt. Avg. Contractual Life Remaining			3 years 219 days	4 years 328 days	3 years 292 days
Wgt. Avg. Exercise Price	$ 1.77	$ 1.95	$ 1.55	$ 3.57	$ 1.77