Note 5 - Intangible Assets and Goodwill - Goodwill and Intangible Assets (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Intangible assets, net	$ 1,358,000	$ 1,467,000
Goodwill	781,000	781,000
Intangible assets, amortization and foreign exchange	(40,000)	(109,000)
Intangible assets, net	1,318,000	1,358,000
Goodwill	$ 781,000	$ 781,000