Note 5 - Concentrations (Tables)

6 Months Ended

Jun. 30, 2022

Inventory Purchases [Member]

Notes Tables

Schedules of Concentration of Risk, by Risk Factor [Table Text Block]

	For the three months ended						For the six months ended
	June 30,						June 30,
	2022			2021			2022			2021
Vendor A		59	%		69	%		52	%		63	%
Vendor B		28	%		5	%		30	%		5	%
Vendor C		5	%		13	%		6	%		14	%

	June 30,			December 31,
	2022			2021
Customer A		9	%		27	%