Note 5 - Accounts Receivable and Revenues (Tables)

6 Months Ended

Jun. 30, 2022

Notes Tables

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

	Customer
	A			B			C
% of revenues, three months ended June 30, 2022		13	%		10	%		1	%
% of revenues, three months ended June 30, 2021		6	%		15	%		15	%
% of revenues, six months ended June 30, 2022		12	%		10	%		3	%
% of revenues, six months ended June 30, 2021		6	%		12	%		11	%
% of accounts receivable, as of June 30, 2022		8	%		9	%		1	%
% of accounts receivable, as of December 31, 2021		15	%		8	%		9	%

Disaggregation of Revenue [Table Text Block]

	Three Months Ended June 30				Six Months Ended June 30
	2022		2021		2022		2021
United States	$	9,912	$	7,221	$	20,158	$	15,417
Other countries		278		353		591		762
Revenues	$	10,190	$	7,574	$	20,749	$	16,179