Note 17 - Stock Incentive Plans - Summary of Activity for Restricted Stock Units, Long-term Incentive Awards and Non-employee Director Stock Compensation (Details) - Restricted Stock Units (RSUs) [Member] shares in Thousands	12 Months Ended
	Dec. 31, 2019 $ / shares shares
Number of shares - Nonvested (in shares) | shares	1,185
Weighted average grant date fair value - Nonvested (in dollars per share) | $ / shares	$ 1.88
Number of shares - Granted (in shares) | shares	610
Weighted average grant date fair value - Granted (in dollars per share) | $ / shares	$ 1.68
Number of shares - Vested (in shares) | shares	(770)
Weighted average grant date fair value - Vested (in dollars per share) | $ / shares	$ 1.86
Number of shares - Canceled or expired (in shares) | shares	(233)
Weighted average grant date fair value - Canceled or expired (in dollars per share) | $ / shares	$ 1.93
Number of shares - Nonvested (in shares) | shares	792
Weighted average grant date fair value - Nonvested (in dollars per share) | $ / shares	$ 1.74