Note 1 - Description of Business and Summary of Significant Accounting Policies - Summary of Fair Value Maturities for Financial Asset (Details) $ in Thousands	Dec. 31, 2022 USD ($)
Assets, fair value	$ 50,396
Cash equivalents and marketable securities, less than 1 year	50,396
Cash equivalents and marketable securities, 5-10 years	0
Cash equivalents and marketable securities, more than 10 years	$ 0