Note 2 - Summary of Significant Accounting Policies - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2020
Total sales, net	$ 1,840	$ 2,170	$ 5,780	$ 8,046	$ 8,046
Avenova Product [Member]
Total sales, net	1,763	1,835	5,221		4,509
KN95 Masks [Member]
Total sales, net	0	69	0		3,081
Other Products [member]
Total sales, net	71	263	540		448
Product [Member]
Total sales, net	1,834	2,167	5,761	8,038	8,038
Product and Service, Other [Member]
Total sales, net	$ 6	$ 3	$ 19	$ 8	$ 8