Note 13 - Share-Based Payments (Detail) - Details of stock option transactions for the three months ended June 30, 2011 and June 30, 2010 are (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Outstanding, beginning of period	8,458,699	8,254,749	8,746,041	8,272,249
Outstanding, beginning of period (in Dollars per share)	$ 0.57	$ 0.56	$ 0.57	$ 0.56
Granted	504,000		549,000
Granted (in Dollars)	$ 1.38		$ 1.35
Exercised	(378,936)		(673,153)	(7,250)
Exercised (in Dollars)	0.58		0.52	0.48
Forfeited	(59,250)	(17,625)	(97,375)	(27,875)
Forfeited (in Dollars)	0.74	0.69	0.78	0.71
Expired	(14)		(14)
Expired (in Dollars)	$ 0.49		$ 0.49
Outstanding, end of period	8,524,499	8,237,124	8,524,499	8,237,124
Outstanding, end of period (in Dollars per share)	$ 0.62	$ 0.55	$ 0.62	$ 0.55
Options exercisable, end of period	6,864,749	6,972,124	6,864,749	6,972,124
Options exercisable, end of period (in Dollars per share)	$ 0.55	$ 0.53	$ 0.55	$ 0.53