Note 12 - 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	3 Months Ended
	Mar. 31, 2020 $ / shares shares
Number of shares - Nonvested (in shares) | shares	792
Weighted average grant date fair value - Nonvested (in dollars per share) | $ / shares	$ 1.74
Number of shares - Granted (in shares) | shares
Weighted average grant date fair value - Granted (in dollars per share) | $ / shares
Number of shares - Vested (in shares) | shares	(406)
Weighted average grant date fair value - Vested (in dollars per share) | $ / shares	$ 1.79
Number of shares - Canceled or expired (in shares) | shares
Weighted average grant date fair value - Canceled or expired (in dollars per share) | $ / shares
Number of shares - Nonvested (in shares) | shares	386
Weighted average grant date fair value - Nonvested (in dollars per share) | $ / shares	$ 1.69