Note 14 - Restructuring Costs - Restructuring Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Balance
Restructuring costs	4,920
Cash paid, net of receipts	(1,272)	(41)
Balance	3,648
Contract Termination [Member]
Balance
Restructuring costs	3,223
Cash paid, net of receipts
Balance	3,223
Employee Severance [Member]
Balance
Restructuring costs	368
Cash paid, net of receipts	0
Balance	368
Impairment Charges [Member]
Balance
Restructuring costs	1,272
Cash paid, net of receipts	(1,272)
Balance
Other Restructuring [Member]
Balance
Restructuring costs	57
Cash paid, net of receipts
Balance	$ 57