Note 1 - Organization and Summary of Significant Accounting Policies - Summary of Convertible Notes (Details) - USD ($)	3 Months Ended
Dec. 31, 2024	Dec. 31, 2023
Decrease (increase) in fair value of convertible debt	$ 89,963	$ 0
Fair Value, Inputs, Level 1 [Member]
Balance at September 30, 2024
Decrease (increase) in fair value of convertible debt
Balance at December 31, 2024	0
Fair Value, Inputs, Level 2 [Member]
Balance at September 30, 2024
Decrease (increase) in fair value of convertible debt
Balance at December 31, 2024	0
Fair Value, Inputs, Level 3 [Member]
Balance at September 30, 2024	1,171,308,000
Decrease (increase) in fair value of convertible debt	(809,287,000)
Balance at December 31, 2024	$ 362,021,000

Including the current and noncurrent portions, carrying amount of debt identified as being convertible into another form of financial instrument (typically the entity's common stock) as of the balance sheet date, which originally required full repayment more than twelve months after issuance or greater than the normal operating cycle of the company.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-SubTopic 10
-Topic 210
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16)(a)(2))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1

Name:	us-gaap_ConvertibleDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant