Note 1 - Summary of Significant Accounting Policies - Amortization Expense Classification (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Capitalized contract cost	$ 911	$ 641	$ 1,802	$ 1,328
Direct Expenses [Member]
Capitalized contract cost	60	13	178	19
Selling, General and Administrative Expenses [Member]
Capitalized contract cost	$ 851	$ 628	$ 1,624	$ 1,309