Note 1 - Summary of Significant Accounting Policies - Amortization Expense Classification (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Capitalized contract cost	$ 2,651	$ 3,242	$ 2,908
Direct Expenses [Member]
Capitalized contract cost	157	272	34
Selling, General and Administrative Expenses [Member]
Capitalized contract cost	$ 2,494	$ 2,970	$ 2,874