Note 13 - Mezzanine Equity and Stockholders' Equity (Details Textual) - USD ($)								1 Months Ended	3 Months Ended			9 Months Ended
	Jan. 24, 2025	Jul. 26, 2024	Jul. 19, 2024	Jul. 18, 2024	Apr. 03, 2024	Apr. 02, 2024	Nov. 09, 2023	Jul. 31, 2024	Mar. 31, 2025	Sep. 30, 2024	Mar. 31, 2024	Mar. 31, 2025	May 15, 2025	Dec. 31, 2024	Jun. 30, 2024	Jul. 19, 224
Preferred Stock, Par or Stated Value Per Share (in dollars per share)									$ 0.001			$ 0.001		$ 0.001
Proceeds from Warrant Exercises									$ 312,000		$ 0
Conversion of Stock, Amount Converted									2,863,000
Gain (Loss) on Extinguishment of Debt									(22,000)		14,520,000
Stock Issued During Period, Value, Conversion of Convertible Securities									$ 476,000		280,000
Common Stock, Par or Stated Value Per Share (in dollars per share)									$ 0.001			$ 0.001		$ 0.001
Additional Paid in Capital									$ 863,995,000			$ 863,995,000		$ 859,660,000
Dividends, Preferred Stock, Cash									216,000
Stock Redeemed or Called During Period, Value									373,000
Preferred Stock, Value, Issued									$ 0			0		0
ELOC Purchase Agreement [Member]
Stock Issued During Period, Shares, New Issues (in shares)									200,000
Agreement, Maximum Equity Value to be Issued															$ 35
Proceeds from Issuance of Common Stock									$ 2,000,000
Senior Convertible Notes With First PIPE [Member]
Long-Term Debt, Gross								$ 1,200,000
Gain (Loss) on Extinguishment of Debt									(100,000)			(100,000)
Senior Convertible Notes With First PIPE [Member] | Embedded Derivative Financial Instruments [Member]
Derivative Liability									300,000			300,000
June and July Notes [Member]
Gain (Loss) on Extinguishment of Debt												0
July 2024 First Purchase Agreement [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)				68,813
Proceeds from Issuance of Private Placement				$ 12,900,000
Noncash Proceeds from Issuance of Private Placement				$ 9,500,000
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)				$ 205.5
July 2024 First Purchase Agreement [Member] | Subsequent Event [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)													$ 1.1
First PIPE [Member] | Chief Executive Officer [Member]
Proceeds from Issuance or Sale of Equity				$ 15,000
First PIPE [Member] | Chief Managerial Officer [Member]
Proceeds from Issuance or Sale of Equity				$ 10,000
July 2024 Second Purchase Agreement [Member]
Proceeds from Issuance of Private Placement		$ 1,000,000
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)		$ 5,348
First and Second Private Placement [Member]
Payments of Stock Issuance Costs												1,200,000
First and Second Private Placement [Member] | July 2024 First Purchase Agreement Placement Agent [Member]
Payments of Stock Issuance Costs												200,000
ELOC Purchase Agreement [Member]
Proceeds from Issuance or Sale of Equity									$ 1,978,000		$ 0
Stock Issued During Period, Value, New Issues, Percentage of Total Proceeds									30.00%
June 2024 Equity Line of Credit [Member]
Stock Issued During Period, Shares, New Issues (in shares)									402
ATM Program [Member]
Stock Issued During Period, Shares, New Issues (in shares)											2,862
Proceeds from Issuance of Common Stock									$ 0		$ 1,367,000
ATM Program [Member] | Ladenburg [Member]
Commission Fee, Percent Fee							3.00%
Reimbursement, Maximum Disbursement							$ 60,000
Reimbursement, Additional Maximum Quarterly Disbursement							$ 3,000
July 2024 Warrants [Member]
Stock Issued During Period, Shares, Exercise of Warrants (in shares)									47,799
Proceeds from Warrant Exercises									$ 300,000
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)								$ 205.5
Warrants and Rights Outstanding								$ 10,800,000						$ 300,000
July 2024 Warrants [Member] | First and Second Private Placement [Member]
Payments of Stock Issuance Costs												$ 1,100,000
July 2024 First Purchase Agreement Warrants [Member]
Class of Warrant or Right, Issued During Period (in shares)								18,182
Proceeds from (Repurchase of) Equity								$ 3,400,000
Warrants and Rights Outstanding										$ 2,600,000
July 2024 First Purchase Agreement Warrants [Member] | Chief Managerial Officer [Member]
Class of Warrant or Right, Issued During Period (in shares)				53
July 2024 Second Purchase Agreement Warrants [Member]
Proceeds from Issuance of Warrants								700,000
July 2024 Second Purchase Agreement Warrants [Member] | Placement Agent Fees and Expenses [Member]
Class of Warrant or Right, Issued During Period (in shares)												160
Conversion of Series C Preferred Stock Into Common Stock [Member]
Conversion of Stock, Shares Converted (in shares)									8,521
Conversion of Stock, Shares Issued (in shares)									3,045,531
Conversion of Stock, Amount Converted									$ 48,000
Additional Paid in Capital									2,900,000			$ 2,900,000
Gain (Loss) on Conversion of Stock									0
First Private Placement to June and July Notes [Member] | July 2024 First Purchase Agreement [Member]
Class of Warrant or Right, Exchanged During Period									4,125			4,125
First Private Placement to Senior Convertible Notes [Member] | July 2024 First Purchase Agreement [Member]
Class of Warrant or Right, Exchanged During Period								8,891
First Private Placement to Series B [Member] | July 2024 First Purchase Agreement [Member]
Class of Warrant or Right, Exchanged During Period									$ 437,614			$ 437,614
Series C Preferred Stock [Member]
Preferred Stock, Par or Stated Value Per Share (in dollars per share)	$ 0.001		$ 1,000						$ 1,000			$ 1,000
Preferred Stock, Convertible, Conversion Price (in dollars per share)	$ 8.04		$ 187
Stock Issuance Agreement, Shares Authorized (in shares)			18,820
Convertible Preferred Stock, Shares Issued upon Conversion (in shares)			5
Preferred Stock, Dividend Rate, Percentage			10.00%
Preferred Stock Dividend Rate Triggering Event Percentage			18.00%
Conversion of Stock, Amount Converted									$ 2,863,000		$ 0
Series C Preferred Stock [Member] | Chief Executive Officer [Member]
Class of Warrant or Right, Issued During Period (in shares)				80
Series C Preferred Stock [Member] | Subsequent Event [Member]
Preferred Stock, Convertible, Conversion Price (in dollars per share)													$ 1.1
Series C Preferred Stock [Member] | Minimum [Member]
Preferred Stock, Convertible, Conversion Price (in dollars per share)																$ 64
Series C Preferred Stock [Member] | July 2024 First Purchase Agreement [Member]
Preferred Stock, Par or Stated Value Per Share (in dollars per share)				$ 0.001
Stock Issued During Period, Shares, New Issues (in shares)				16,099						4,255
Series C Preferred Stock [Member] | July 2024 First Purchase Agreement [Member] | July 2024 First Purchase Agreement Placement Agent [Member]
Stock Issued During Period, Shares, New Issues (in shares)				161
Class of Warrant or Right, Issued During Period (in shares)				1,258
Series C Preferred Stock [Member] | First PIPE [Member] | Chief Executive Officer [Member]
Stock Issued During Period, Shares, New Issues (in shares)				19
Series C Preferred Stock [Member] | First PIPE [Member] | Chief Managerial Officer [Member]
Stock Issued During Period, Shares, New Issues (in shares)				13
Series C Preferred Stock [Member] | July 2024 Second Purchase Agreement [Member]
Stock Issued During Period, Shares, New Issues (in shares)		1,250										1,250
Proceeds from Issuance of Preferred Stock and Preference Stock								300,000
Series C Preferred Stock [Member] | July 2024 Second Purchase Agreement [Member] | Placement Agent Fees and Expenses [Member]
Stock Issued During Period, Shares, New Issues (in shares)		30
Series C Preferred Stock [Member] | First and Second Private Placement [Member]
Payments of Stock Issuance Costs												$ 1,400,000
Series C Preferred Stock [Member] | First and Second Private Placement [Member] | First and Second Purchase Agreement Placement Agent [Member]
Stock Issued During Period, Shares, New Issues (in shares)												191
Class of Warrant or Right, Issued During Period (in shares)												1,418
Payments of Stock Issuance Costs												$ 300,000
Series C Preferred Stock [Member] | ELOC Purchase Agreement [Member]
Preferred Stock, Par or Stated Value Per Share (in dollars per share)									$ 1,000			$ 1,000
Preferred Stock, Redemption Premium, Percentage									20.00%			20.00%
Stock Redeemed or Called During Period, Value, Net									$ 600,000
Dividends, Preferred Stock, Cash									100,000
Stock Redeemed or Called During Period, Value									0.5
Series C Preferred Stock [Member] | Conversion of Series C Preferred Stock Into Common Stock [Member]
Conversion of Stock, Shares Converted (in shares)	1,895
Conversion of Stock, Shares Issued (in shares)	235,846
Series C Preferred Stock [Member] | First Private Placement to June and July Notes [Member] | July 2024 First Purchase Agreement [Member]
Conversion of Stock, Shares Issued (in shares)												966
Conversion of Stock, Amount Issued												$ 800,000
Conversion of Stock, Amount Converted									$ 1,600,000
Series C Preferred Stock [Member] | First Private Placement to June and July Notes [Member] | July 2024 Second Purchase Agreement [Member]
Conversion of Stock, Amount Issued								$ 0.8
Series C Preferred Stock [Member] | First Private Placement to Senior Convertible Notes [Member] | July 2024 First Purchase Agreement [Member]
Conversion of Stock, Shares Issued (in shares)												2,080
Series C Preferred Stock [Member] | First Private Placement to Series B [Member] | July 2024 First Purchase Agreement [Member]
Conversion of Stock, Shares Issued (in shares)												8,798
Series B Preferred Stock [Member]
Preferred Stock, Par or Stated Value Per Share (in dollars per share)					$ 1,000
Preferred Stock, Convertible, Conversion Price (in dollars per share)					$ 324.27
Stock Issued During Period, Shares, New Issues (in shares)						5,500
Stock Issuance Agreement, Shares Authorized (in shares)					5,500
Convertible Preferred Stock, Shares Issued upon Conversion (in shares)					3
Preferred Stock, Dividend Rate, Percentage					10.00%
Stock Issued During Period, Shares, Conversion of Convertible Securities (in shares)												5,500
Stock Issued During Period, Value, Conversion of Convertible Securities												$ 6,900,000
Payments of Stock Issuance Costs					$ 68,000
Preferred Stock, Value, Issued					7,000,000
Stock Issuance Agreement, Amount Authorized					$ 5,500,000
Series B Preferred Stock [Member] | Minimum [Member]
Preferred Stock, Convertible, Conversion Price (in dollars per share)					$ 64.89
Series B Preferred Stock [Member] | July 2024 First Purchase Agreement [Member]
Stock Issued During Period, Shares, New Issues (in shares)				5,500
July 2024 Second Purchase Agreement Warrants [Member]
Class of Warrant or Right, Issued During Period (in shares)								5,348
Proceeds from Issuance or Sale of Equity, Gross								$ 1,000,000