Note 10 - ¾% Notes (Detail) (USD $)	1 Months Ended			1 Months Ended
	Dec. 31, 2003	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2003 Per $1,000 Principal Amount of Debt [Member]	Dec. 31, 2003 Prior to December 22, 2021 [Member]	Dec. 31, 2003 On Or After December 22, 2021 [Member]	Dec. 31, 2010 Convertible Subordinated Debt [Member]	Dec. 31, 2003 Convertible Subordinated Debt [Member]
Debt Instrument, Face Amount								$ 225,000,000
Debt Issuance Cost	6,800,000
Proceeds from Convertible Debt	218,200,000
Common Stock, Par or Stated Value Per Share (in Dollars per share)		$ 0.001	$ 0.001
Debt Instrument, Convertible, Terms of Conversion, Minimum Stock Price As Percentage Of Conversion Price					120.00%	120.00%
Principal Amount Basis of Convertible Debt Used to Determine the Conversion Price Per Share of Common Stock In Debt Conversion	1,000
Debt Instrument, Convertible, Number of Equity Instruments1				8.5441
Debt Instrument, Convertible, Conversion Price (in Dollars per share)	$ 117.04
Debt Instrument, Repurchased Face Amount							100,000
Convertible Subordinated Debt		$ 300,000	$ 300,000
Redemption Price of Convertible Debt, As a Percentage of Principal Amount		100.00%