Note 12 - Share-based Compensation - Summary of Restricted Stock Units Outstanding (Details) - Restricted Stock Units (RSUs) [Member] shares in Thousands	12 Months Ended
	Dec. 31, 2021 $ / shares shares
Granted, Shares (in shares) | shares	7,154
Granted, Weighted Average Grant Date Fair Value Per Share (in dollars per share) | $ / shares	$ 3.31
Forfeited, Shares (in shares) | shares	(50)
Forfeited, Weighted Average Grant Date Fair Value Per Share (in dollars per share) | $ / shares	$ 3.31
Non-vested, Shares (in shares) | shares	7,104
Non-vested, Weighted Average Grant Date Fair Value Per Share (in dollars per share) | $ / shares	$ 3.31