Note 9 - Earnings Per Common Share (Details) - Reconciliation of Earnings Per Share Data (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Note 9 - Earnings Per Common Share (Details) - Reconciliation of Earnings Per Share Data [Line Items]
Income from continuing operations (in Dollars)	$ 9,009		$ 12,637		$ 18,837		$ 23,479
Income from continuing operations per share:
Basic (in Dollars per share)	$ 0.09		$ 0.13		$ 0.19		$ 0.24
Diluted (in Dollars per share)	$ 0.08		$ 0.11		$ 0.16		$ 0.21
(Loss) from discontinued operations, net of tax (in Dollars)	$ (503)				$ (503)
(Loss) from discontinued operations per share
Basic (in Dollars per share)	$ (0.01)				$ (0.01)
Diluted (in Dollars per share)	$ (0.01)				$ (0.01)
Weighted average basic shares outstanding	103,183		96,122		99,926		96,025
Dilutive securities:
Stock option and unvested RSAs	5,038		4,380		5,008		4,383
Stock warrants	749		6,614		3,779		6,564
Shares issuable upon conversion of convertible notes (1)	9,122	[1]	5,212	[1]	8,863	[1]	5,038	[1]
Total dilutive securities	14,909		16,206		17,650		15,985
Weighted average diluted shares outstanding	118,092		112,328		117,576		112,010
2003 Stock Option Plan [Member]
Dilutive securities:
Shares subject to stock options omitted from the calculation of income per share as their effect would have been anti-dilutive	598		1,373		336		1,289

[1] The number of shares issuable upon conversion of the Notes is based on the assumption that the Company would repay the principal of the Notes in cash and pay any incremental value in shares of common stock.