Note 12 - Taxes on Income - Net Deferred Taxes (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Foreign tax credit carryforwards	$ 6,152	$ 4,101
General business credit carryforwards	1,485	844
Net operating loss carryforwards	15,546	19,079
Accrued expenses	15,047	15,119
Operating lease liabilities	15,820	17,360
Other	5,999	7,587
Total gross deferred income tax assets	60,049	64,090
Less valuation allowance	(43,424)	(34,247)
Net deferred income tax assets	16,625	29,843
Property, plant and equipment	(4,625)	(5,689)
Intangible assets	(1,009)	(12,203)
Operating lease assets	(15,464)	(17,198)
Other	5,423	4,791
Total deferred income tax liabilities	(26,521)	(39,881)
Net deferred income tax liabilities	(9,896)	(10,038)
Deferred income tax assets	448	1,216
Noncurrent deferred income tax liabilities, net	(10,344)	(11,254)
Net deferred income tax liabilities	$ 9,896	$ 10,038