Note 2 - Summary of Significant Accounting Policies - Calculation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Loss from continuing operations, net of income taxes	$ (49,843)	$ (25,702)
Income from discontinued operations, net of income taxes	(11,371)	(1,745)
Net loss	$ (61,214)	$ (27,447)
Basic and diluted weighted average number of shares outstanding (in shares)	58,348,489	29,937,863
Loss from continuing operations per common share - basic and diluted (in dollars per share)	$ (0.86)	$ (0.86)
Loss from discontinued operations per common share - basic and diluted (in dollars per share)	(0.19)	(0.06)
Loss per common share - basic and diluted (in dollars per share)	$ (1.05)	$ (0.92)