Note 8 - Significant Customers / Concentration / Disaggregated Revenue (Tables)

3 Months Ended

Mar. 31, 2021

Notes Tables

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

	For the three months ended
	March 31, 2021			March 31, 2020
Customer A		18	%		12	%
Customer B		10	%		35	%
Customer C		*			12	%
Customer D		*			11	%

	March 31, 2021			December 31, 2020
Customer A		11	%		11	%
Customer B		17	%		40	%
Customer C		*			16	%
Customer E		16	%		*