Note 8 - Noncontrolling Interest - Clyra Medical - Summary of Accounts Payable and Accrued Expenses (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Accounts payable	$ 1,039	$ 717
Accrued payroll	160	198
Accrued interest	25	25
Accounts payable and accrued expenses, total	1,224	940
Clyra Medical [Member]
Accounts payable	235	186
Accrued payroll	6	45
Accrued interest	8	7
Accrued dividend	29
Accounts payable and accrued expenses, total	$ 278	$ 238