Note 9 - Equity (Details Textual)														1 Months Ended			3 Months Ended				5 Months Ended	9 Months Ended
	Aug. 28, 2024 USD ($) shares	May 23, 2024 USD ($) $ / shares shares	Apr. 19, 2024 USD ($) shares	Apr. 18, 2024 USD ($) $ / shares shares	Apr. 01, 2024 $ / shares shares	Mar. 06, 2024 USD ($)	Mar. 05, 2024 USD ($) shares	Feb. 29, 2024 USD ($) $ / shares shares	Feb. 28, 2024 USD ($) $ / shares shares	Feb. 27, 2024 $ / shares shares	Feb. 07, 2024 USD ($) $ / shares shares	Jan. 02, 2024 USD ($) shares	Aug. 14, 2023 shares	Apr. 30, 2024 shares	Mar. 31, 2024 shares	Aug. 31, 2023 USD ($) shares	Sep. 30, 2024 USD ($) $ / shares shares	Jun. 30, 2024 USD ($) shares	Mar. 31, 2024 USD ($) shares	Sep. 30, 2023 USD ($) shares	Jul. 29, 2024 $ / shares shares	Sep. 30, 2024 USD ($) $ / shares shares	Sep. 30, 2023 USD ($) shares	Aug. 14, 2024 USD ($) $ / shares shares	Mar. 28, 2024 shares	Dec. 31, 2023 $ / shares shares	May 24, 2021 $ / shares shares
Common Stock, Shares, Issued (in shares)					9,600,000												11,373,246					11,373,246			95,700,000	8,391,940
Common Stock, Shares, Outstanding (in shares)					9,600,000												11,373,246					11,373,246			95,700,000	8,391,940
Stock Issued During Period, Shares, Reverse Stock Splits (in shares)					0									73,040
Preferred Stock, Shares Authorized (in shares)																	50,000,000					50,000,000
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares																	$ 0.001					$ 0.001
Stock Issued During Period, Shares, New Issues (in shares)																						1,700,000
Common Stock, Shares Authorized (in shares)																	500,000,000					500,000,000				500,000,000
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares					$ 0.001												$ 0.001					$ 0.001				$ 0.001
Proceeds from Issuance of Private Placement | $																						$ 1,027,000	$ 8,122,000
Stock Issued During Period, Shares, Issued for Services (in shares)	20,000
Stock Issued During Period, Value, Issued for Services | $	$ 0.1																$ 37,000
Class of Warrant or Right, Outstanding (in shares)															4,034,337		5,327,636	4,069,240	4,034,337			5,327,636				3,321,499
Fair Value Adjustment of Warrants | $																	$ (165,000)			$ (26,000)		$ (174,000)	(27,000)
Adjustments to Additional Paid in Capital, Warrant Issued | $																			$ 0
February Warrants [Member]
Warrants and Rights Outstanding, Term (Year)									5 years
Adjustments to Additional Paid in Capital, Warrant Issued | $									$ 500,000
February Warrants [Member] | Measurement Input, Share Price [Member]
Warrants and Rights Outstanding, Measurement Input									3.59
February Warrants [Member] | Measurement Input, Exercise Price [Member]
Warrants and Rights Outstanding, Measurement Input									3.8
February Warrants [Member] | Measurement Input, Expected Term [Member]
Warrants and Rights Outstanding, Measurement Input									5
February Warrants [Member] | Measurement Input, Price Volatility [Member]
Warrants and Rights Outstanding, Measurement Input									1.781
February Warrants [Member] | Measurement Input, Risk Free Interest Rate [Member]
Warrants and Rights Outstanding, Measurement Input									0.0426
February Warrants [Member] | Measurement Input, Expected Dividend Rate [Member]
Warrants and Rights Outstanding, Measurement Input									0
Substitute Warrants [Member]
Fair Value Adjustment of Warrants | $																	$ 0	$ 100,000				$ 100,000	$ 100,000
Substitute Warrants [Member] | Neuro Rx [Member]
Foreign Currency Exchange Rate, Remeasurement																											0.316
Class of Warrant or Right, Outstanding (in shares)																											3,792,970
Public Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)																	344,886					344,886				344,886	345,000
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares																											$ 115
Class of Warrant or Right, Outstanding (in shares)																	3,448,856					3,448,856				3,448,856	3,450,000
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares)																											0.1
Class of Warrant or Right, Exercised During Period (in shares)																	0			0		0	0
Private Placement Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)																	13,625					13,625
Class of Warrant or Right, Outstanding (in shares)																	136,250					136,250
Fair Value Adjustment of Warrants | $																	$ 100,000			$ 100,000		$ 100,000	$ 100,000
February Underwriter Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)									25,000
Warrants and Rights Outstanding, Term (Year)									5 years
Adjustments to Additional Paid in Capital, Warrant Issued | $									$ 100,000
February Underwriter Warrants [Member] | Measurement Input, Share Price [Member]
Warrants and Rights Outstanding, Measurement Input									3.05
February Underwriter Warrants [Member] | Measurement Input, Exercise Price [Member]
Warrants and Rights Outstanding, Measurement Input									3.3
February Underwriter Warrants [Member] | Measurement Input, Expected Term [Member]
Warrants and Rights Outstanding, Measurement Input									5
February Underwriter Warrants [Member] | Measurement Input, Price Volatility [Member]
Warrants and Rights Outstanding, Measurement Input									1.781
February Underwriter Warrants [Member] | Measurement Input, Risk Free Interest Rate [Member]
Warrants and Rights Outstanding, Measurement Input									0.0426
February Underwriter Warrants [Member] | Measurement Input, Expected Dividend Rate [Member]
Warrants and Rights Outstanding, Measurement Input									0
Underwriter Overallotment Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)							3,750
Adjustments to Additional Paid in Capital, Warrant Issued | $			$ 100,000				$ 100,000
Underwriter Overallotment Warrants [Member] | Measurement Input, Share Price [Member]
Warrants and Rights Outstanding, Measurement Input		3.62	3.04				3.05
Underwriter Overallotment Warrants [Member] | Measurement Input, Exercise Price [Member]
Warrants and Rights Outstanding, Measurement Input		3.63	3.63				3.3
Underwriter Overallotment Warrants [Member] | Measurement Input, Expected Term [Member]
Warrants and Rights Outstanding, Measurement Input		5	5				5
Underwriter Overallotment Warrants [Member] | Measurement Input, Price Volatility [Member]
Warrants and Rights Outstanding, Measurement Input		1.781	1.781				1.781
Underwriter Overallotment Warrants [Member] | Measurement Input, Risk Free Interest Rate [Member]
Warrants and Rights Outstanding, Measurement Input		0.0452	0.0466				0.0412
Underwriter Overallotment Warrants [Member] | Measurement Input, Expected Dividend Rate [Member]
Warrants and Rights Outstanding, Measurement Input		0	0				0
Alvogen and Lotus Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)											419,598
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares											$ 4
Warrants and Rights Outstanding, Term (Year)											3 years
Adjustments to Additional Paid in Capital, Warrant Issued | $											$ 1,300,000
Class of Warrant or Right, Beneficial Ownership Limitation											4.99%
Alvogen and Lotus Warrants [Member] | Measurement Input, Share Price [Member]
Warrants and Rights Outstanding, Measurement Input											4.1
Alvogen and Lotus Warrants [Member] | Measurement Input, Exercise Price [Member]
Warrants and Rights Outstanding, Measurement Input											4
Alvogen and Lotus Warrants [Member] | Measurement Input, Expected Term [Member]
Warrants and Rights Outstanding, Measurement Input											3
Alvogen and Lotus Warrants [Member] | Measurement Input, Price Volatility [Member]
Warrants and Rights Outstanding, Measurement Input											1.38
Alvogen and Lotus Warrants [Member] | Measurement Input, Risk Free Interest Rate [Member]
Warrants and Rights Outstanding, Measurement Input											0.042
Alvogen and Lotus Warrants [Member] | Measurement Input, Expected Dividend Rate [Member]
Warrants and Rights Outstanding, Measurement Input											0
Anson Warrants Tranche One [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)																								1,349,305
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares																								$ 2.4168
Warrants and Rights Outstanding, Term (Year)																								5 years
Warrants and Rights Outstanding | $																	1,900,000					$ 1,900,000		$ 2,100,000
Anson Warrants Tranche One [Member] | Measurement Input, Share Price [Member]
Warrants and Rights Outstanding, Measurement Input																								1.86
Anson Warrants Tranche One [Member] | Measurement Input, Exercise Price [Member]
Warrants and Rights Outstanding, Measurement Input																								2.42
Anson Warrants Tranche One [Member] | Measurement Input, Expected Term [Member]
Warrants and Rights Outstanding, Measurement Input																								5
Anson Warrants Tranche One [Member] | Measurement Input, Price Volatility [Member]
Warrants and Rights Outstanding, Measurement Input																								1.22
Anson Warrants Tranche One [Member] | Measurement Input, Risk Free Interest Rate [Member]
Warrants and Rights Outstanding, Measurement Input																								0.0367
Anson Warrants Tranche One [Member] | Measurement Input, Expected Dividend Rate [Member]
Warrants and Rights Outstanding, Measurement Input																								0
Maximum [Member] | Alvogen and Lotus Warrants [Member]
Class of Warrant or Right, Beneficial Ownership Limitation											9.99%
ATM Offering [Member]
Stock Issued During Period, Shares, New Issues (in shares)													4,900,000								385,515
Stock Issued During Period, Value, New Issues | $																	$ 219,000	$ 1,228,000	179,000
ATM Offering [Member] | Minimum [Member]
Shares Issued, Price Per Share (in dollars per share) | $ / shares																					$ 2.42
ATM Offering [Member] | Maximum [Member]
Shares Issued, Price Per Share (in dollars per share) | $ / shares																					$ 7.1
Private Placement [Member]
Stock Issued During Period, Shares, New Issues (in shares)								270,000	270,000
Stock Issued During Period, Value, New Issues | $																			1,027,000
Private Placement, Premium Percentage								26.70%
Proceeds from Issuance of Private Placement | $								$ 1,000,000
Private Placement [Member] | February Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)								270,000	270,000
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares								$ 3.8	$ 3.8
February Underwriting Agreement [Member]
Stock Issued During Period, Shares, New Issues (in shares)										500,000
Shares Issued, Price Per Share (in dollars per share) | $ / shares										$ 2.76
Share Price (in dollars per share) | $ / shares										$ 3
Proceeds from Issuance or Sale of Equity | $									$ 1,300,000
Payments of Stock Issuance Costs | $									$ 400,000
February Overallotment Option [Member]
Stock Issued During Period, Shares, New Issues (in shares)										75,000
Share Price (in dollars per share) | $ / shares										$ 3
Proceeds from Issuance or Sale of Equity | $						$ 200,000
Payments of Stock Issuance Costs | $						$ 200,000
April Underwriter Agreement [Member]
Stock Issued During Period, Shares, New Issues (in shares)				607,000
Shares Issued, Price Per Share (in dollars per share) | $ / shares				$ 3.3
April Overallotment Agreement [Member]
Stock Issued During Period, Shares, New Issues (in shares)		91,050		91,050
Shares Issued, Price Per Share (in dollars per share) | $ / shares		$ 3.3
Proceeds from Issuance or Sale of Equity | $		$ 200,000
Payments of Stock Issuance Costs | $		$ 100,000
April 2024 Offering [Member]
Payments of Stock Issuance Costs | $				$ 400,000
Proceeds from Issuance of Common Stock | $				$ 1,600,000
April 2024 Offering [Member] | April Underwriter Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)		4,553	30,350
Warrants and Rights Outstanding, Term (Year)			6 years
April 2024 Offering [Member] | April Overallotment Warrants [Member]
Warrants and Rights Outstanding, Term (Year)			5 years
Convertible Debt [Member] | Conversion of Debt to Common Stock [Member]
Debt Conversion, Converted Instrument, Shares Issued (in shares)												143,648
Debt Conversion, Converted Instrument, Amount | $												$ 400,000
Preferred Stock [Member]
Stock Issued During Period, Shares, Reverse Stock Splits (in shares)																		0
Stock Issued During Period, Shares, Issued for Services (in shares)																	0
Stock Issued During Period, Value, Issued for Services | $																	$ 0
Adjustments to Additional Paid in Capital, Warrant Issued | $																			$ 0
Preferred Stock [Member] | ATM Offering [Member]
Stock Issued During Period, Shares, New Issues (in shares)																	0	0	0
Stock Issued During Period, Value, New Issues | $																	$ 0	$ 0	$ 0
Preferred Stock [Member] | Private Placement [Member]
Stock Issued During Period, Shares, New Issues (in shares)																			0
Stock Issued During Period, Value, New Issues | $																			$ 0
Conversion of Series A Preferred Stock to Preferred Stock [Member] | Preferred Stock [Member]
Conversion of Stock, Shares Issued (in shares)															300,000
Series A Preferred Stock [Member]
Preferred Stock, Shares Authorized (in shares)																	12,000,000					12,000,000
Stock Issued During Period, Shares, New Issues (in shares)																3,000,000
Stock Issued During Period, Value, New Issues | $																$ 1,200,000
Preferred Stock, Shares Issued (in shares)																	0					0
Preferred Stock, Shares Outstanding (in shares)																	0					0
Series A Preferred Stock [Member] | Preferred Stock [Member]
Stock Issued During Period, Shares, Reverse Stock Splits (in shares)																		0
Conversion of Stock, Shares Converted (in shares)																			3,000,000
Stock Issued During Period, Shares, Issued for Services (in shares)																	0
Stock Issued During Period, Value, Issued for Services | $																	$ 0
Adjustments to Additional Paid in Capital, Warrant Issued | $																			$ 0
Series A Preferred Stock [Member] | Preferred Stock [Member] | ATM Offering [Member]
Stock Issued During Period, Shares, New Issues (in shares)																	0	0	0
Stock Issued During Period, Value, New Issues | $																	$ 0	$ 0	$ 0
Series A Preferred Stock [Member] | Preferred Stock [Member] | Private Placement [Member]
Stock Issued During Period, Shares, New Issues (in shares)																			0
Stock Issued During Period, Value, New Issues | $																			$ 0
Series A Preferred Stock [Member] | Conversion of Series A Preferred Stock to Preferred Stock [Member]
Conversion of Stock, Shares Converted (in shares)															3,000,000
Reverse Stock Split [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio					10