Note 2 - Prepaid Expenses and Other Current Assets - Summary of Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Prepaid subscriptions	$ 139	$ 161
Prepaid insurance	316	292
Prepaid marketing and sponsorships	60	25
Other	285	381
Total prepaid expenses and other current assets	$ 800	$ 859