Note 1 - Summary of Significant Accounting Policies - Amortization Expense Classification (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Capitalized contract cost	$ 736	$ 748	$ 2,538	$ 2,098
Direct Expenses [Member]
Capitalized contract cost	43	10	221	26
Selling, General and Administrative Expenses [Member]
Capitalized contract cost	$ 693	$ 738	$ 2,317	$ 2,072