Note 5 - Income Taxes - Tax Reserves (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Taxes	$ 42	$ 13	$ 8
Interest	14
Penalty	13
Total Tax Liability	69
State and Local Jurisdiction [Member]
Taxes	42
Interest	14
Penalty	13
Total Tax Liability	$ 69

Carrying value as of the balance sheet date of obligations incurred and payable for statutory income, sales, use, payroll, excise, real, property and other taxes.

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