Note 20 - Employee Benefit Plan (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent	60.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	4.00%	4.00%	4.00%
Defined Contribution Plan, Employer Discretionary Contribution Amount	$ 1,800	$ 1,600	$ 1,600
Deposits And Other Assets Noncurrent	78,915	66,989
Severance Costs	2,000	3,000	3,500
Gain (Loss) Of Severance Fund	1,300	900	$ 1,000
Israeli Severance Funds [Member]
Deposits And Other Assets Noncurrent	$ 9,100	$ 10,700