Note 6 - Revenue - Contract Balances (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Accounts receivable, net	$ 381,164	$ 330,817
Deferred revenue	13,001	17,038
Billed Revenues [Member]
Accounts receivable, net	244,150	236,158
Unbilled Revenues [Member]
Accounts receivable, net	$ 137,014	$ 94,659