Note 10 - Basic and Diluted Net Loss Per Share (Details Textual) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Aug. 12, 2025
Basic and diluted weighted average shares outstanding (in shares)	168,782,000	137,589,000	148,545,000	137,263,000
Weighted Average Number of Shares Outstanding, Diluted (in shares)		137,600,000		137,300,000
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)	18,400,000	17,300,000	18,400,000	17,300,000
Pre-Funded Warrants in Connection with Underwriting Agreement [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights					6,710,000
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)					$ 0.0001