Note 11 - Income Taxes - Income Tax Effects of Temporary Differences That Comprise Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Noncurrent deferred tax assets:
Equity method investment	$ 300	$ 195
Goodwill	490	0
Other accrued expenses	27	33
Notes receivable fair value adjustment	480	319
Employee benefits	48	50
Capital loss carryforward	11	11
AMT credit	0	0
Net operating loss	7,662	7,861
Gross non-current deferred tax assets	9,017	8,469
Property, tax, and equipment	(5)	(1)
Non-taxable dividends	(429)	(193)
Gain on remeasurement of Acquisition	(843)	0
Valuation allowance	(7,740)	(8,275)
Gross non-current deferred tax liabilities	(9,017)	(8,469)
Other Assets [Member]
Noncurrent deferred tax assets:
Net noncurrent deferred tax assets	$ 0	$ 0