Note 1 - Organization, Nature of Business and Summary of Significant Accounting Policies - Securities Excluded From Computation of Basic and Diluted Earnings Per Share (Details) - shares shares in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Basic earnings per share:
Unvested restricted stock (in shares)	1,529	2,610	1,448
Diluted earnings per share:
Potentially dilutive securities excluded as anti-dilutive (in shares)	6,298	5,786	204
Employee Stock Option [Member]
Diluted earnings per share:
Potentially dilutive securities excluded as anti-dilutive (in shares)	4,808	3,661	201
Restricted Stock [Member]
Diluted earnings per share:
Potentially dilutive securities excluded as anti-dilutive (in shares)	1,490	2,125	3