Note 6 - Stockholders' Equity (Detail) - 2004 Plan Option Plan Status (USD $)	0 Months Ended	11 Months Ended	12 Months Ended
	Feb. 14, 2012	Dec. 31, 2010	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2009
Stock Options Outstanding		5,835,118	3,813,361	4,863,239	7,410,914
Weighted Average Exercise Price (in Dollars per share)		$ 14.61	$ 15.62	$ 15.31	$ 13.48
Weighted Average Remaining Contractual Term		4 years 109 days	2 years 204 days	3 years 160 days	5 years 14 days
Aggregat Intrinsic Value (in Dollars)		$ 19,035,591	$ 25,379,573	$ 8,817,049	$ 77,918,848
Options exercisable at December 31, 2012 and expected to become exercisable			3,799,748
Options exercisable at December 31, 2012 and expected to become exercisable (in Dollars per share)			$ 15.62
Options exercisable at December 31, 2012 and expected to become exercisable			2 years 200 days
Options exercisable at December 31, 2012 and expected to become exercisable (in Dollars)			25,288,257
Options vested and exercisable at December 31, 2012			3,603,762
Options vested and exercisable at December 31, 2012 (in Dollars per share)			$ 15.59
Options vested and exercisable at December 31, 2012			2 years 153 days
Options vested and exercisable at December 31, 2012 (in Dollars)			24,105,872
Stock Options Outstanding	413,000	370,500	178,484	152,500
Weighted Average Exercise Price (in Dollars per share)		$ 19.92	$ 15.63	$ 13.96
Stock Options Outstanding		(1,452,245)	(1,151,884)	(685,417)
Weighted Average Exercise Price (in Dollars per share)		$ 9.87	$ 11.62	$ 6.85
Stock Options Outstanding		(494,051)	(76,478)	(438,962)
Weighted Average Exercise Price (in Dollars per share)		$ 15.67	$ 20.90	$ 18.66
Modification adjustment (in Dollars)			$ (0.74)