Note 4 - Warrants and Equity (Details Textual) - USD ($) $ / shares in Units, $ in Thousands			1 Months Ended			3 Months Ended		9 Months Ended	12 Months Ended
	Jan. 31, 2025	Oct. 31, 2024	Feb. 28, 2025	Aug. 31, 2024	Mar. 31, 2024	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2024	Dec. 31, 2024	Dec. 26, 2023
Loss On Issuance of Warrant Liabilities						$ (7,798)	$ 0
Warrant Liabilities, Transaction Costs						$ 1,788	$ (0)
Stock Issued During Period, Shares, Issued for Services (in shares)					6,834
Warrant Liability [Member]
Derivative Liability				$ 6,100
Pre-funded Warrants in 2025 Agreement [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)			2,121,029
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)			$ 0.001
Series D Warrants in 2025 Agreement [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)			6,543,058
Common Warrants in 2025 Agreement [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)			$ 1.07
Warrants and Rights Outstanding, Term (Year)			5 years
Inducement Warrants In 2025 Warrant Inducement Offer Letter [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)			5,828,570
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)			$ 1
Series C Warrants In 2025 Warrant Inducement Offer Letter [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)			11,657,140
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)			$ 0.75			$ 1
Warrants and Rights Outstanding, Term (Year)			5 years
Proceeds from Issuance or Sale of Equity			$ 5,800
Pre-funded Warrants in 2024 Agreement [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)				2,183,368
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)				$ 0.001
Series A Warrants in 2024 Agreement [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)				2,466,368
Series B Warrants in 2024 Agreement [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)				2,466,368
Common Warrants in 2024 Agreement [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)				2.23
Common Warrants Issued In Connection With The 2023 Securities Purchase Agreement[Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)		895,834
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)		$ 2.23								$ 9.6
Warrants and Rights Outstanding, Term (Year)		5 years
Loss On Issuance of Warrant Liabilities									$ 400
Securities Purchase Agreement 2024 [Member]
Loss On Issuance of Warrant Liabilities				$ 800
Warrant Liabilities, Transaction Costs									$ 1,000
Pre-funded Warrants [Member]
Class of Warrant or Right, Outstanding (in shares)						0
Equity Classified Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)		36,000			3,334		3,334	3,334
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)					$ 9.15		$ 9.15	$ 9.15
Warrants and Rights Outstanding, Term (Year)		10 years			10 years		10 years	10 years
Class of Warrant or Right, Outstanding (in shares)						197,993			1,746,993
Class of Warrant or Right, Vesting Period (Year)								4 years
Class of Warrant or Right, Vested and Exercisable (in shares)						50,512			1,697,744
Equity Classified Warrants [Member] | Vesting Based On Performance Criteria [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)	50,000
Equity Classified Warrants [Member] | Vesting Over 4 Year Term [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)	50,000	30,000
Class of Warrant or Right, Vesting Period (Year)	4 years	4 years
Equity Classified Warrants [Member] | Vesting Over 3 Year Term [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)		5,000
Class of Warrant or Right, Vesting Period (Year)		3 years
Equity Classified Warrants [Member] | Vesting Immediately [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)		1,000
Equity Classified Warrants [Member] | Consultant 1 [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)	50,000
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)	$ 1.64
Warrants and Rights Outstanding, Term (Year)	10 years
Equity Classified Warrants [Member] | Consultant 2 [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)	$ 1.64
Warrants and Rights Outstanding, Term (Year)	10 years
Common Stock in 2025 Agreement [Member]
Stock Issued During Period, Shares, New Issues (in shares)			1,150,000
Securities Purchase Agreement 2025 [Member]
Equity Issued, Purchase Price Per Share (in dollars per share)			$ 1.07
Proceeds from Issuance or Sale of Equity			$ 3,500
Securities Purchase Agreement 2025 and Warrant Inducement Offer Letter [Member]
Proceeds from Issuance or Sale of Equity			$ 9,300
Common Stock in 2024 Agreement [Member]
Stock Issued During Period, Shares, New Issues (in shares)				283,000
Securities Purchase Agreement 2024 [Member]
Equity Issued, Purchase Price Per Share (in dollars per share)				$ 2.23
Proceeds from Issuance or Sale of Equity				$ 5,500