Note 4 - Warrants - Summary of Valuation Assumption (Details)	Sep. 18, 2025	Jun. 26, 2025	Dec. 18, 2024	Aug. 22, 2024	Aug. 19, 2024	May 29, 2024	May 27, 2024	Feb. 09, 2024
The May 2024 Warrants [Member] \| Measurement Input, Risk Free Interest Rate [Member]
Measurement Input						0.046
The May 2024 Warrants [Member] \| Measurement Input, Expected Term [Member]
Measurement Input						5
The May 2024 Warrants [Member] \| Measurement Input, Price Volatility [Member]
Measurement Input						0.93
The May 2024 Warrants [Member] \| Measurement Input, Share Price [Member]
Measurement Input						26.8
The May 2024 Warrants [Member] \| Measurement Input, Exercise Price [Member]
Measurement Input						29.2
The May 2024 Warrants [Member] \| Measurement Input, Expected Dividend Rate [Member]
Measurement Input						0
Existing Warrants [Member] \| Measurement Input, Risk Free Interest Rate [Member]
Measurement Input							0.047	0.046
Existing Warrants [Member] \| Measurement Input, Expected Term [Member]
Measurement Input							4.5	5
Existing Warrants [Member] \| Measurement Input, Price Volatility [Member]
Measurement Input							0.97	0.93
Existing Warrants [Member] \| Measurement Input, Share Price [Member]
Measurement Input							26.8	26.8
Existing Warrants [Member] \| Measurement Input, Exercise Price [Member]
Measurement Input							100	29.2
Existing Warrants [Member] \| Measurement Input, Expected Dividend Rate [Member]
Measurement Input							0	0
The August 2024 Warrants [Member] \| Measurement Input, Risk Free Interest Rate [Member]
Measurement Input				0.037
The August 2024 Warrants [Member] \| Measurement Input, Expected Term [Member]
Measurement Input				5
The August 2024 Warrants [Member] \| Measurement Input, Price Volatility [Member]
Measurement Input				1.11
The August 2024 Warrants [Member] \| Measurement Input, Share Price [Member]
Measurement Input				18
The August 2024 Warrants [Member] \| Measurement Input, Exercise Price [Member]
Measurement Input				15.93
The August 2024 Warrants [Member] \| Measurement Input, Expected Dividend Rate [Member]
Measurement Input				0
Existing Warrants, June 2021 [Member] \| Measurement Input, Risk Free Interest Rate [Member]
Measurement Input				0.037	0.041
Existing Warrants, June 2021 [Member] \| Measurement Input, Expected Term [Member]
Measurement Input				5	1.76
Existing Warrants, June 2021 [Member] \| Measurement Input, Price Volatility [Member]
Measurement Input				1.11	1
Existing Warrants, June 2021 [Member] \| Measurement Input, Share Price [Member]
Measurement Input				22.8	22.8
Existing Warrants, June 2021 [Member] \| Measurement Input, Exercise Price [Member]
Measurement Input				15.93	82.5
Existing Warrants, June 2021 [Member] \| Measurement Input, Expected Dividend Rate [Member]
Measurement Input				0	0
The December 2024 Series A Common Warrants [Member] \| Measurement Input, Risk Free Interest Rate [Member]
Measurement Input			0.043
The December 2024 Series A Common Warrants [Member] \| Measurement Input, Expected Term [Member]
Measurement Input			0.5
The December 2024 Series A Common Warrants [Member] \| Measurement Input, Price Volatility [Member]
Measurement Input			1.20
The December 2024 Series A Common Warrants [Member] \| Measurement Input, Share Price [Member]
Measurement Input			28.8
The December 2024 Series A Common Warrants [Member] \| Measurement Input, Exercise Price [Member]
Measurement Input			30
The December 2024 Series A Common Warrants [Member] \| Measurement Input, Expected Dividend Rate [Member]
Measurement Input			0
June 2025 Series C Common Warrants [Member] \| Measurement Input, Risk Free Interest Rate [Member]
Measurement Input		0.038
June 2025 Series C Common Warrants [Member] \| Measurement Input, Expected Term [Member]
Measurement Input		5
June 2025 Series C Common Warrants [Member] \| Measurement Input, Price Volatility [Member]
Measurement Input		1.19
June 2025 Series C Common Warrants [Member] \| Measurement Input, Share Price [Member]
Measurement Input		7.2
June 2025 Series C Common Warrants [Member] \| Measurement Input, Exercise Price [Member]
Measurement Input		10
June 2025 Series C Common Warrants [Member] \| Measurement Input, Expected Dividend Rate [Member]
Measurement Input		0
September 2025 Series E Common Warrants [Member] \| Measurement Input, Risk Free Interest Rate [Member]
Measurement Input	0.037
September 2025 Series E Common Warrants [Member] \| Measurement Input, Expected Term [Member]
Measurement Input	5
September 2025 Series E Common Warrants [Member] \| Measurement Input, Price Volatility [Member]
Measurement Input	1.29
September 2025 Series E Common Warrants [Member] \| Measurement Input, Share Price [Member]
Measurement Input	6.2
September 2025 Series E Common Warrants [Member] \| Measurement Input, Exercise Price [Member]
Measurement Input	6.7
September 2025 Series E Common Warrants [Member] \| Measurement Input, Expected Dividend Rate [Member]
Measurement Input	0
The August 2024 Pre Funded Warrants [Member] \| Measurement Input, Risk Free Interest Rate [Member]
Measurement Input				0.037
The August 2024 Pre Funded Warrants [Member] \| Measurement Input, Expected Term [Member]
Measurement Input				5
The August 2024 Pre Funded Warrants [Member] \| Measurement Input, Price Volatility [Member]
Measurement Input				1.11
The August 2024 Pre Funded Warrants [Member] \| Measurement Input, Share Price [Member]
Measurement Input				18
The August 2024 Pre Funded Warrants [Member] \| Measurement Input, Exercise Price [Member]
Measurement Input				0.002
The August 2024 Pre Funded Warrants [Member] \| Measurement Input, Expected Dividend Rate [Member]
Measurement Input				0
Existing Warrants, November 2023 [Member] \| Measurement Input, Risk Free Interest Rate [Member]
Measurement Input				0.037	0.037
Existing Warrants, November 2023 [Member] \| Measurement Input, Expected Term [Member]
Measurement Input				5	4.25
Existing Warrants, November 2023 [Member] \| Measurement Input, Price Volatility [Member]
Measurement Input				1.11	1.11
Existing Warrants, November 2023 [Member] \| Measurement Input, Share Price [Member]
Measurement Input				22.8	22.8
Existing Warrants, November 2023 [Member] \| Measurement Input, Exercise Price [Member]
Measurement Input				15.93	100
Existing Warrants, November 2023 [Member] \| Measurement Input, Expected Dividend Rate [Member]
Measurement Input				0	0
The December 2024 Series B Common Warrants [Member] \| Measurement Input, Risk Free Interest Rate [Member]
Measurement Input			0.044
The December 2024 Series B Common Warrants [Member] \| Measurement Input, Expected Term [Member]
Measurement Input			5
The December 2024 Series B Common Warrants [Member] \| Measurement Input, Price Volatility [Member]
Measurement Input			1.11
The December 2024 Series B Common Warrants [Member] \| Measurement Input, Share Price [Member]
Measurement Input			28.8
The December 2024 Series B Common Warrants [Member] \| Measurement Input, Exercise Price [Member]
Measurement Input			30
The December 2024 Series B Common Warrants [Member] \| Measurement Input, Expected Dividend Rate [Member]
Measurement Input			0
June 2025 Series D Common Warrants [Member] \| Measurement Input, Risk Free Interest Rate [Member]
Measurement Input		0.04
June 2025 Series D Common Warrants [Member] \| Measurement Input, Expected Term [Member]
Measurement Input		1
June 2025 Series D Common Warrants [Member] \| Measurement Input, Price Volatility [Member]
Measurement Input		1.57
June 2025 Series D Common Warrants [Member] \| Measurement Input, Share Price [Member]
Measurement Input		7.2
June 2025 Series D Common Warrants [Member] \| Measurement Input, Exercise Price [Member]
Measurement Input		10
June 2025 Series D Common Warrants [Member] \| Measurement Input, Expected Dividend Rate [Member]
Measurement Input		0
September 2025 Series F Common Warrants [Member] \| Measurement Input, Risk Free Interest Rate [Member]
Measurement Input	0.036
September 2025 Series F Common Warrants [Member] \| Measurement Input, Expected Term [Member]
Measurement Input	1
September 2025 Series F Common Warrants [Member] \| Measurement Input, Price Volatility [Member]
Measurement Input	1.54
September 2025 Series F Common Warrants [Member] \| Measurement Input, Share Price [Member]
Measurement Input	6.2
September 2025 Series F Common Warrants [Member] \| Measurement Input, Exercise Price [Member]
Measurement Input	6.7
September 2025 Series F Common Warrants [Member] \| Measurement Input, Expected Dividend Rate [Member]
Measurement Input	0
The August 2024 Underwriter Warrants [Member] \| Measurement Input, Risk Free Interest Rate [Member]
Measurement Input				0.037
The August 2024 Underwriter Warrants [Member] \| Measurement Input, Expected Term [Member]
Measurement Input				5
The August 2024 Underwriter Warrants [Member] \| Measurement Input, Price Volatility [Member]
Measurement Input				1.11
The August 2024 Underwriter Warrants [Member] \| Measurement Input, Share Price [Member]
Measurement Input				18
The August 2024 Underwriter Warrants [Member] \| Measurement Input, Exercise Price [Member]
Measurement Input				26.25
The August 2024 Underwriter Warrants [Member] \| Measurement Input, Expected Dividend Rate [Member]
Measurement Input				0