Note 1 - Organization and Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2022

Notes Tables

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

	Accounts Receivable						Revenue
	June 30,			December 31,			Three Months Ended June 30,					Six Months Ended June 30,
	2022			2021			2022			2021		2022			2021
Customer A		17	%		21	%		*			*		*			*
Customer B		16	%		11	%		20	%		*		20	%		*

Revenue from External Customers by Products and Services [Table Text Block]

	Three Months Ended						Six Months Ended
	June 30,						June 30,
Revenue by customers’ geographic locations	2022			2021			2022			2021
United States		75	%		82	%		77	%		80	%
Europe, Middle East, Africa (EMEA)		17	%		10	%		17	%		11	%
Canada		5	%		5	%		3	%		6	%
Other		3	%		3	%		3	%		3	%
Total revenue		100	%		100	%		100	%		100	%