Note 11 - Stockholders' Equity (Details Textual) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Common Stock, Shares Authorized	150,000,000	150,000,000
Common Stock, Par or Stated Value Per Share	$ 0.0001	$ 0.0001
Preferred Stock, Shares Authorized	5,000,000	5,000,000
Preferred Stock, Par or Stated Value Per Share	$ 0.0001	$ 0.0001
Proceeds from Warrant Exercises	$ 0	$ 12,047
Class of Warrant or Right, Exercised During Period		1,815,012
Class of Warrant or Right, Outstanding	0	1,391,667