Note 9 - In-process Research and Development; Impairment Expense - Summary of Impairment Expense (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Asset Impairment Charges, Total	$ 197,000	$ 342,000
Impairment expense	$ (197,000)	(342,000)
Corporate Segment [Member]
Asset Impairment Charges, Total		2,150,000
Impairment expense		(2,150,000)
Clyra Medical [Member]
Asset Impairment Charges, Total		1,808,000
Impairment expense		(1,808,000)
In Process Research and Development [Member]
Asset Impairment Charges, Total		(2,150,000)
Impairment expense		2,150,000
In Process Research and Development [Member] | Corporate Segment [Member]
Asset Impairment Charges, Total		(2,150,000)
Impairment expense		2,150,000
In Process Research and Development [Member] | Clyra Medical [Member]
Asset Impairment Charges, Total		0
Impairment expense		0
Debt Obligations [Member]
Asset Impairment Charges, Total		1,007,000
Impairment expense		(1,007,000)
Debt Obligations [Member] | Corporate Segment [Member]
Asset Impairment Charges, Total		0
Impairment expense		0
Debt Obligations [Member] | Clyra Medical [Member]
Asset Impairment Charges, Total		1,007,000
Impairment expense		(1,007,000)
Accounts Payable and Accrued Interest [Member]
Asset Impairment Charges, Total		458,000
Impairment expense		(458,000)
Accounts Payable and Accrued Interest [Member] | Corporate Segment [Member]
Asset Impairment Charges, Total		0
Impairment expense		0
Accounts Payable and Accrued Interest [Member] | Clyra Medical [Member]
Asset Impairment Charges, Total		458,000
Impairment expense		(458,000)
Liability to Scion Shareholders [Member]
Asset Impairment Charges, Total		540,000
Impairment expense		(540,000)
Liability to Scion Shareholders [Member] | Corporate Segment [Member]
Asset Impairment Charges, Total		0
Impairment expense		0
Liability to Scion Shareholders [Member] | Clyra Medical [Member]
Asset Impairment Charges, Total		540,000
Impairment expense		(540,000)
Other Asset, Prepaid Marketing [Member]
Asset Impairment Charges, Total		197,000
Impairment expense		(197,000)
Other Asset, Prepaid Marketing [Member] | Corporate Segment [Member]
Asset Impairment Charges, Total		0
Impairment expense		0
Other Asset, Prepaid Marketing [Member] | Clyra Medical [Member]
Asset Impairment Charges, Total		197,000
Impairment expense		$ (197,000)