Note 11 - Fair Value Measurements - Schedule of Level 3 Fair Value Changes (Details) - USD ($)	2 Months Ended	3 Months Ended
	Sep. 30, 2024	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023
Anson Convertible Notes [Member]
Convertible note payable - current portion	$ 0	$ 0
Convertible note payable, net of current portion	2,985	2,985
Streeterville Convertible Note [Member]
Convertible note payable - current portion	3,050,000	3,050,000			$ 10,069,000
Convertible note payable, net of current portion	0	0			0
Streeterville Convertible Note [Member]
Fair value of the Note as of December 31, 2023		7,651,000	$ 6,779,000	$ 9,161,000	12,692,000	$ 12,189,000	$ 10,525,000
Conversions and repayments of principal and interest (cash)		(2,500,000)	849,000	(2,300,000)	(2,200,000)		(88,000)
Conversions and repayments of principal and interest (shares)			(400,000)		(782,000)	(200,000)
Fair value adjustment through earnings		(2,101,000)	23,000	318,000	359,000	663,000	1,770,000
Default penalty		(2,500,000)	849,000	(2,300,000)	(2,200,000)		(88,000)
Fair value adjustment through accumulated other comprehensive loss						128,000	(106,000)
Fair value of the Note as of March 31, 2024	3,050,000	3,050,000	7,651,000	6,779,000	10,069,000	12,692,000	12,189,000
Anson Convertible Notes [Member]
Fair value of the Note as of December 31, 2023	2,941
Conversions and repayments of principal and interest (shares)	(702)
Fair value adjustment through earnings	746
Fair value of the Note as of March 31, 2024	2,985	2,985
Warrants [Member]
Fair value of the Note as of December 31, 2023		8,000	26,000	17,000	36,000	25,000	37,000
Fair value adjustment through earnings		(165,000)	(18,000)	9,000	(26,000)	11,000	(12,000)
Fair value of the Note as of March 31, 2024	$ 1,902,000	1,902,000	$ 8,000	$ 26,000	$ 10,000	$ 36,000	$ 25,000
Initial recognition of issuance of warrants		$ 2,059,000