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