Note 1 - Organization and Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2022

Notes Tables

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

	Accounts Receivable						Revenue
	September 30,			December 31,			Three Months Ended September 30,						Nine Months Ended September 30,
	2022			2021			2022			2021			2022			2021
Customer A		22	%		21	%		*			*			*			*
Customer B		10	%		11	%		17	%		19	%		19	%		14	%

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

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
Revenue by customers’ geographic locations	2022			2021			2022			2021
United States		69	%		82	%		74	%		80	%
Europe, Middle East, Africa (EMEA)		20	%		9	%		18	%		10	%
Canada		8	%		6	%		5	%		7	%
Other		3	%		3	%		3	%		3	%
Total revenue		100	%		100	%		100	%		100	%