Note 12 - Stockholders' Equity - Non-vested Stock Options, SARs and RSUs (Details) shares in Thousands	12 Months Ended
	Dec. 31, 2018 $ / shares shares
Non-vested (in shares) | shares	1,179
Non-vested, weighted average grant date fair value (in dollars per share) | $ / shares	$ 7.50
Granted (in shares) | shares	630
Granted, weighted average grant date fair value (in dollars per share) | $ / shares	$ 10.52
Vested (in shares) | shares	(627)
Vested, weighted average grant date fair value (in dollars per share) | $ / shares	$ 7.54
Forfeited (in shares) | shares	(55)
Forfeited, weighted average grant date fair value (in dollars per share) | $ / shares	$ 9.10
Non-vested (in shares) | shares	1,127
Non-vested, weighted average grant date fair value (in dollars per share) | $ / shares	$ 9.09