Note 11 - Net Loss Per Share - Basic and Diluted Common Shares (Details) - $ / shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Weighted average shares outstanding - basic and diluted (in shares)	150,933	126,314	148,943	123,835
Dilutive unvested stock, convertible preferred stock, Common Stock Warrants and IPO Warrants (in shares)	0	0	0	0
Diluted (in shares)	150,933	126,314	148,943	123,835
Basic and diluted net loss per share attributable to common stockholders (in dollars per share)	$ (0.84)	$ (0.13)	$ (1.08)	$ (0.27)