Note 8 - Concentrations (Tables)

3 Months Ended

Mar. 31, 2022

Notes Tables

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

Accounts Receivable	March 31, 2022			December 31, 2021
Customer 1		35	%		--
Customer 2		16	%		--
Customer 3		1	%		23	%
Customer 4		9	%		23	%

	Three Months Ended March 31,
Revenues	2022				2021
Customer 1	$	1,271,000	48	%	$	151,000	10	%
Customer 2	$	2,000	--		$	316,000	21	%