Note 14 - Equity Offerings - Summary of Sales Under Offering (Details) - The 2022 ATM Offering [Member] $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($) $ / shares shares
Total shares of common stock sold (in shares) | shares	933,672
Average price per share (in dollars per share) | $ / shares	$ 0.43
Gross proceeds	$ 403
Commisssion paid to agents	12
Net proceeds	$ 391