Note 5 - Intangible Assets and Goodwill - Summary of Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	$ 120	$ 120
Intangible Assets, Gross (Excluding Goodwill), Total	10,882	11,222
Accumulated amortization	(10,762)	(10,646)
Intangible assets, net	120	576
Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets	4,739	4,739
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets	$ 6,023	$ 6,363