Note 10 - Equipment Held for Sale (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Dec. 31, 2018
Property, Plant and Equipment, Negotiated Sales Price	$ 600
Proceeds from Sale of Machinery and Equipment	420
Equipment Held-for-sale, Current	585	$ 585
Restructuring Plan 2019 [Member]
Property, Plant and Equipment, Disposals	$ 585