Note 4 - Accounts Receivable and Revenues (Tables)

12 Months Ended

Dec. 31, 2022

Notes Tables

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

	Customer
	A			B			C
% of revenue, 2022		14.0	%		8.5	%		6.8	%
% of revenue, 2021		11.9	%		0.3	%		11.4	%
% of accounts receivable, as of December 31, 2022		11.6	%		18.6	%		0.2	%
% of accounts receivable, as of December 31, 2021		17.2	%		0.0	%		9.0	%

Disaggregation of Revenue [Table Text Block]

	2022		2021
United States	$	40,267	$	29,637
Other countries		1,350		1,494
Revenues	$	41,617	$	31,131