Note 5 - Revenue From Contracts With Customers (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021	Dec. 31, 2020
Contract with Customer, Liability, Revenue Recognized	$ 51,400	$ 42,100	$ 227,300	$ 189,100
Amortization of Deferred Sales Commissions	1,300	1,000	3,600	2,800
Capitalized Contract Cost, Impairment Loss	0	$ 0	0	$ 0
Accounts Receivable, after Allowance for Credit Loss, Current, Total	98,717		98,717		$ 108,998	$ 100,200
Contract with Customer, Liability, Current	278,947		278,947		257,872	213,500
Contract with Customer, Liability, Noncurrent	$ 24,182		$ 24,182		$ 32,753	$ 30,500