Note 3 - Intangible Assets and Goodwill - Goodwill and Intangible Assets (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Intangible assets, net	$ 1,591,000	$ 21,629,000
Goodwill	781,000	13,976,000
Intangible assets, amortization and foreign exchange	(124,000)	(152,000)
Goodwill, foreign exchange
Intangible assets, impairment loss		(19,886,000)
Goodwill, impairment loss		(13,195,000)
Intangible assets, net	1,467,000	1,591,000
Goodwill	$ 781,000	$ 781,000