Note 9 - Stock-Based Compensation - Restricted Stock Units (Details) - Restricted Stock Units (RSUs) [Member] shares in Thousands	9 Months Ended
	Sep. 30, 2022 $ / shares shares
Shares Outstanding, Beginning Balance (in shares) | shares	0
Weighted- Average Grant Date Fair Value, Outstanding, Beginning Balance (in dollars per share) | $ / shares	$ 0
Awarded (in shares) | shares	582
Awarded, Weighted- Average Grant Date Fair Value, Outstanding (in dollars per share) | $ / shares	$ 0.99
Cancelled (in shares) | shares	(24)
Cancelled, Weighted- Average Grant Date Fair Value, Outstanding (in dollars per share) | $ / shares	$ 1.02
Outstanding at September 30, 2022 (in shares) | shares	558
Weighted- Average Grant Date Fair Value, Outstanding (in dollars per share) | $ / shares	$ 0.99
Vested and exercisable at September 30, 2022 (in shares) | shares	0
Vested and exercisable Weighted- Average Grant Date Fair Value (in dollars per share) | $ / shares	$ 0
Vested and expected to vest at September 30, 2022 (in shares) | shares	558
Vested and expected to vest Weighted- Average Grant Date Fair Value (in dollars per share) | $ / shares	$ 0.99