Note 6 - Share-based Compensation - Restricted Stock Units (Details) - Restricted Stock Units (RSUs) [Member]	9 Months Ended
	Sep. 30, 2024 $ / shares shares
Outstanding, Balance, RSU (in shares) | shares	213,044
Outstanding, Weighted-average Grant Date Fair Value (in dollars per share) | $ / shares	$ 1.43
Granted, RSU (in shares) | shares	354,219	[1]
Granted, Weighted-average Grant Date Fair Value (in dollars per share) | $ / shares	$ 1.6	[1]
Vested, RSU (in shares) | shares	(437,546)	[2]
Vested, Weighted-average Grant Date Fair Value (in dollars per share) | $ / shares	$ 1.52	[2]
Unvested shares forfeited(3) (in shares) | shares	(11,792)	[3]
Unvested shares forfeited(3) (in dollars per share) | $ / shares	$ 1.59
Outstanding, Balance, RSU (in shares) | shares	117,925
Outstanding, Weighted-average Grant Date Fair Value (in dollars per share) | $ / shares	$ 1.59

[1] On March 13, 2024, the Company granted 212,709 RSUs with immediate vesting, to executives and key personnel in lieu of cash bonuses earned for the year ended 2023. On January 2, 2024, the Company granted 141,510 RSUs, vesting upon one year anniversary of the grant, to the Board of Directors. The fair value of the common stock is the Company's closing stock price on the grant date as reported on the Nasdaq Stock Exchange.

[2] Represents 212,709 RSUs granted to executives and key personnel, 174,837 RSUs granted to the Board of Directors, and 50,000 RSUs granted to a contractor.

[3] Represents the cancellation of RSUs granted to a former member of the Board of Directors.