Note 7 - Stockholders' Equity (Deficit) (Tables)

9 Months Ended

Sep. 30, 2025

Notes Tables

Schedule of Stock by Class [Table Text Block]

							Original		Shares							Shares		Conversion			Shares
	Shares		Gross		Net		Conversion		Outstanding		Series F		Series F			Outstanding		Price at			Issuable at
Date of Purchase	Purchased		Proceeds		Proceeds		Price		December 31, 2024		Issued		Converted			September 30, 2025		September 30, 2025			September 30, 2025
November 15, 2023		1,850	$	1,850,000	$	1,850,000	$	124.7000		150		—		—			150	$	0.8294	(ii)		180,854
March 6, 2024		1,000		1,000,000		950,000		60.2900		435		—		(335	)		100		0.8294	(ii)		120,569
April 12, 2024		1,050		1,050,000		1,050,000		37.0000		1,050		—		(1,050	)		—		0.8294			—
May 31, 2024		1,050		1,050,000		1,025,000		32.1500		1,050		—		(525	)		525		0.8294	(ii)		632,988
July 25, 2024		500		500,000		500,000		23.1500		500		—		(500	)		—		0.8294			—
August 27, 2024		500		500,000		500,000		20.1900		500		—		(500	)		—		0.8294			—
October 1, 2024 (i)		1,500		—		—		12.0000		1,500		—		(1,500	)		—		0.8294			—
December 18, 2024		750		750,000		750,000		5.2500		750		—		(750	)		—		0.8294			—
February 7, 2025		1,000		1,000,000		1,000,000		2.2203		—		1,000		(1,000	)		—		0.8294			—
March 17, 2025		500		500,000		500,000		1.2036		—		500		(500	)		—		0.8294			—
May 5, 2025		500		500,000		500,000		0.8294		—		500		(500	)		—		0.8294			—
June 6, 2025		500		500,000		500,000		1.1938		—		500		(500	)		—		1.1938			—
June 9, 2025		1,000		1,000,000		1,000,000		1.1928		—		1,000		(1,000	)		—		1.1928			—
June 17, 2025		1,000		1,000,000		1,000,000		1.2546		—		1,000		(1,000	)		—		1.2546			—
July 11, 2025		800		800,000		800,000		1.1908		—		800		(800	)		—		1.1908	(iii)		—
July 18, 2025		1,000		1,000,000		1,000,000		1.4000		—		1,000		(578	)		422		1.4000			301,428
July 21, 2025		500		500,000		500,000		1.4000		—		500		—			500		1.4000			357,143
July 24, 2025		1,000		1,000,000		1,000,000		2.1900		—		1,000		—			1,000		1.8149			550,995
August 22, 2025		500		500,000		500,000		1.8149		—		500		(500	)		—		1.8149	(iv)		—
September 19, 2025		500		500,000		500,000		1.8342		—		500		(500	)		—		1.8342			—
Total September 30, 2025		17,000	$	15,500,000	$	15,425,000	$	—		5,935		8,800		(12,038	)		2,697	$	—			2,143,977
(i) - These shares were issued as consideration for executing the Omnibus Agreement in connection with the October 2024 Offering.
(ii) - Reflects the conversion price after the May 2025 Down Round Trigger that was triggered with the Sale of Series F and Series F warrants on May 5, 2025.
(iii) - Reflects the conversion price after the July 2025 Down Round Trigger that was triggered with the Sale of Series F and Series F warrants on July 11, 2025.
(iv) - Reflects the conversion price after the August 2025 Down Round Trigger that was triggered with the Sale of Series F and Series F warrants on August 22, 2025.

							Original		Shares							Shares		Conversion			Shares
	Shares		Gross		Net		Conversion		Outstanding		Series F		Series F			Outstanding		Price at			Issuable at
Date of Purchase	Purchased		Proceeds		Proceeds		Price		December 31, 2023		Issued		Converted			September 30, 2024		September 30, 2024			September 30, 2024
June 26, 2022		10,000	$	10,000,000	$	9,920,000	$	620.0000		2,925				(2,925	)		—	$	20.1900	(i)		—
March 10, 2023		3,000		3,000,000		3,000,000		420.0000		3,000				(3,000	)		—		20.1900	(i)		—
November 15, 2023		1,850		1,850,000		1,850,000		124.7000		150				—			150		20.1900	(i)		7,429
March 6, 2024		1,000		1,000,000		950,000		60.2900		—		1,000		(550	)		450		20.1900	(i)		22,288
April 12, 2024		1,050		1,050,000		1,050,000		37.0000		—		1,050		—			1,050		20.1900	(i)		52,006
May 31, 2024		1,050		1,050,000		1,025,000		32.1500		—		1,050		—			1,050		20.1900	(i)		52,006
July 25, 2024		500		500,000		500,000		23.1500		—		500					500		20.1900	(i)		24,765
August 26, 2024		500		500,000		500,000		20.1900		—		500					500		20.1900			24,765
Total September 30, 2024		18,950	$	18,950,000	$	18,795,000	$	—		6,075		4,100		(6,475	)		3,700	$	—			183,259
(i) - Reflects the conversion price after the August 2024 Down Round Trigger that was triggered with the Sale of Series F and Series F warrants on August 27, 2024.

Schedule of Dividends Payable [Table Text Block]

Deemed Dividends on Series F Preferred Stock
	Description of	Series F		Conversion Prices		Conversion Price		Incremental Value
Date of Trigger Event	Trigger Event	Triggered		Prior to Trigger		After Trigger		Deemed Dividend
March 17, 2025	March 2025 Down Round Trigger		5,025	$	2.22 - 5.25	$	1.2000	$	976,637
May 5, 2025	May 2025 Down Round Trigger		1,045,402	$	1.10	$	0.8294		1,105,871
July 11, 2025	July 2025 Down Round Trigger		1,551,243	$	1.19 - 1.25	$	1.1908		55,202
August 22, 2025	August 2025 Down Round Trigger		456,621	$	2.19	$	1.8149		130,710
	Deemed Dividends on Series F Preferred Stock							$	2,268,420
Deemed Dividends on Series F Warrants
March 17, 2025	March 2025 Down Round Trigger		593,247	$	2.22 - 5.25	$	1.2000	$	79,695
May 5, 2025	May 2025 Down Round Trigger		593,247	$	1.10	$	0.8294		36,504
July 11, 2025	July 2025 Down Round Trigger		2,054,762	$	1.19 - 1.26	$	1.1908		6,555
August 22, 2025	August 2025 Down Round Trigger		456,621	$	2.19	$	1.8149		16,059
	Deemed Dividends on Series F Warrants							$	138,813
Deemed Dividends on Series B Warrants (see Note 8)
May 5, 2025	May 2025 Down Round Trigger		6,777,101	$	1.9445	$	0.8294		2,426,968
	Deemed Dividends on Series B Warrants							$	2,426,968
	Warrant Modification (i)							$	108,468
	Total Deemed Dividends Series F PS, Series B and F Warrants							$	4,942,669
(i) Reflects the fair value of 88,908 shares of common stock issued for no consideration in exchange for 125,362 Series F warrants in connection with the Series B Amendment (see Note 6).

Deemed Dividends on Series F Preferred Stock
	Description of	Series F		Conversion Prices		Conversion Price		Incremental Value
Date of Trigger Event	Trigger Event	Triggered		Prior to Trigger		After Trigger		Deemed Dividend
March 6, 2024	March 2024 Down Round Trigger		3,945	$	60.29 - 124.50	$	30.00	$	5,102,674
August 27, 2024	August 2024 Down Round Trigger		143,803	$	23.15 - 37.00	$	20.19	$	1,233,686
	Deemed Dividends on Series F Warrants							$	6,336,360
Deemed Dividends on Series F Warrants
March 6, 2024	March 2024 Down Round Trigger		54,695	$	60.29 - 124.50	$	30.00	$	147,030
August 27, 2024	August 2024 Down Round Trigger		137,334	$	23.15 - 37.00	$	20.19		216,546
	Deemed Dividends on Series F Warrants							$	363,576
	Total Deemed Dividends Series F PS and Series F Warrants							$	6,699,936
	Warrant Modification (ii)							$	7,751
	Total Deemed Dividends							$	6,707,687
(ii) On May 31, 2024, the Company agreed to reduce the exercise price of a warrant held by Alpha originally issued in June 2023 from $380.00 to $30.00. As result, the Company recorded a deemed dividend of $7,751 for the incremental value due to the modification

Share-Based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block]

				Weighted Average
				Grant Date
	Shares			Fair Value
Outstanding as of December 31, 2024		7,293		$	324.64
Granted		258,730			1.40
Cancelled		(1,158	)		284.01
Vested		(147,825	)		3.28
Outstanding as of September 30, 2025		117,040			16.40
Vested as of September 30, 2025		10,243			166.50
Unvested as of September 30, 2025		106,797		$	2.01

				Weighted Average
				Grant Date
	Shares			Fair Value
Outstanding as of December 31, 2023		3,054		$	901.50
Granted		7,981			16.50
Cancelled		(43	)		504.50
Vested and released		(687	)		753.00
Outstanding as of September 30, 2024		10,306			233.00
Vested as of September 30, 2024		2,981			820.00
Unvested as of September 30, 2024		7,325		$	25.50

Share-Based Payment Arrangement, Option, Activity [Table Text Block]

								Weighted Average
								Remaining		Aggregate
				Weighted Average		Weighted Average		Contractual Term		Intrinsic
	Shares			Exercise Price		Fair Value		(Years)		Value
Outstanding as of December 31, 2024		56		$	5,342	$	2,874		1.23	$	—
Granted		—			—		—		—		—
Exercised		—			—		—		—		—
Expired/Forfeited		(56	)		5,342		2,874		—		—
Outstanding as of September 30, 2025		—		$	—	$	—		—	$	—
Exercisable as of September 30, 2025		—		$	—	$	—		—	$	—

								Weighted Average
								Remaining		Aggregate
				Weighted Average		Weighted Average		Contractual Term		Intrinsic
	Shares			Exercise Price		Fair Value		(Years)		Value
Outstanding as of December 31, 2023		2,505		$	2,000	$	1,080.00		1.49	$	2,294
Granted		—			—		—		—		—
Exercised		—			—		—		—		—
Expired/Forfeited		(2,450	)		1,956		1,062		—		—
Outstanding as of September 30, 2024		55		$	5,298	$	2,851		1.78	$	—
Exercisable as of September 30, 2024		55		$	5,298	$	2,851		1.78	$	—