Note 3 - Summary of Significant Accounting Policies - Schedule of Antidilutive Securities (Details) - shares shares in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Potentially dilutive securities excluded from computation of diluted weighted average shares outstanding (in shares)	6,471	5,330
Restricted Stock Units (RSUs) [Member]
Potentially dilutive securities excluded from computation of diluted weighted average shares outstanding (in shares)	900	1,200
Share-Based Payment Arrangement, Option [Member]
Potentially dilutive securities excluded from computation of diluted weighted average shares outstanding (in shares)	5,378	3,659
Restricted Stock [Member]
Potentially dilutive securities excluded from computation of diluted weighted average shares outstanding (in shares)	193	471