Note 10 - Accounts Payable and Accrued Expenses - Accounts Payable and Accrued Expenses (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Trade payable	$ 73,271		$ 56,299
Salaries and other payroll costs	24,364		20,188
Customer advances	2,092		918
Accrued interest	6,321		5,914
Income tax payable	11,344		8,436
Property tax payable	3,033		2,999
Scheduling and transmission	2,264		595
Royalty accrual	6,457		4,610
Deferred revenues	2,755		18,402
Warranty accrual	3,245		4,552
Other	9,466		9,551
Total	141,857	$ 113,502	116,362
Deferred Revenue [Member]
Deferred revenues	$ 0		$ 2,300