Note 2 - Prepaid Expenses and Other Current Assets - Summary of Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Prepaid subscriptions	$ 1,112	$ 423
Prepaid insurance	1,032	619
Other	126	107
Total prepaid expenses and other current assets	$ 2,270	$ 1,149