Note 15 - Common Stock Warrants

3 Months Ended

Mar. 31, 2026

Warrants and Rights Disclosure [Text Block]

15.

Common Stock Warrants

In February 2026, the Company issued 437,012 pre-funded warrants to Tumim as the commitment fee for the Company's equity line of credit. The pre-funded warrants are exercisable immediately upon issuance and will not expire until exercised in full. The exercise price of the pre-funded warrants is $0.0001 per share (nominal) as the exercise price was pre-funded to the Company in connection with the payment of the commitment fee.

A summary of the Company’s outstanding warrants as of March 31, 2026 is as follows:

Class of Shares	*Number of Warrant Shares*		*Exercise Price of Warrants*		*Expiration Date of Warrants*
Common Stock		30	$	1,768.00	July 1, 2026
Common Stock		30	$	1,768.00	November 15, 2026
Common Stock		102	$	10,625.00	November 10, 2026
Common Stock		589	$	531.25	August 9, 2027
Common Stock		765	$	112.20	July 10, 2028
Common Stock		1,206	$	81.60	July 14, 2028
Common Stock		781	$	83.64	August 4, 2028
Common Stock		11,083	$	15.90	May 9, 2029
Common Stock		415,589	$	14.45	May 14, 2029
Common Stock		61,287	$	3.04	June 25, 2030
Common Stock		10,000	$	4.20	June 25, 2029
Common Stock		64,065	$	3.04	July 31, 2030
Common Stock		11,068	$	3.80	July 31, 2029
Common Stock		32,500	$	3.64	August 11, 2029
Common Stock		188,842	$	3.04	August 21, 2030
Common Stock		29,830	$	3.52	August 21, 2029
Common Stock		195,793	$	3.04	September 26, 2029
Common Stock		32,249	$	3.26	September 26, 2029
Common Stock		2,904,528	$	2.231	December 10, 2030
Common Stock		4,553,213	$	2.231	December 10, 2030
Common Stock		437,012	$	0.0001	N/A
Total		8,950,562

As of March 31, 2026, the weighted-average exercise price of the warrants outstanding was $2.96 per share and the weighted-average remaining term was 4.6 years. During the three months ended March 31, 2025, a total of 7,524 Series A Warrants were exercised for total proceeds of $109 thousand. There were no warrants exercised during the three months ended March 31, 2026.