Note 12 - Segment Information - Net Sales by Product and Service (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Net sales	$ 62,071	$ 77,614
Less: sales returns	(760)	(1,540)
Product [Member]
Net sales	55,840	73,048
Administrative Fees, Freight and Other [Member]
Net sales	$ 6,991	$ 6,106