Note 12 - Stockholders' Equity - Non-vested Stock Options, SARs and RSUs (Details) shares in Thousands	12 Months Ended
	Dec. 31, 2017 $ / shares shares
Non-vested (in shares) | shares	1,019
Non-vested, weighted average grant date fair value (in dollars per share) | $ / shares	$ 7.69
Granted (in shares) | shares	744
Granted, weighted average grant date fair value (in dollars per share) | $ / shares	$ 7.22
Vested (in shares) | shares	(539)
Vested, weighted average grant date fair value (in dollars per share) | $ / shares	$ 7.46
Forfeited (in shares) | shares	(46)
Forfeited, weighted average grant date fair value (in dollars per share) | $ / shares	$ 7.69
Non-vested (in shares) | shares	1,179
Non-vested, weighted average grant date fair value (in dollars per share) | $ / shares	$ 7.50